At the moment we have a big discussion in Russian Wikipedia that the search engine is working worse than previous one [1].
The key of the problem is that we have a gadget that suggests wiki-links for a selected word based on the internal search results.
I am also posting link to the gadget itself here for information[2] but the issue is connected not with it but with the search itself as we still can't understand its logics.
We gathered some examples of the search results:
1) searching for the following article - https://ru.wikipedia.org/wiki/Гагарин,_Юрий_Алексеевич:
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?search=intitle%3A%D0%AE%D1%80%D0%B8*+intitle%3A%D0%93%D0%B0%D0%B3%D0%B0%D1%80%D0%B8*&title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&go=%D0%9F%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8 | intitle:Юри* intitle:Гагари* ]] >> ~~returns https://ru.wikipedia.org/wiki/Юрино_%28Гагаринский_район%29 ~~ the article is the first of 23 results
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?search=intitle%3A%D0%AE%D1%80*+intitle%3A%D0%93%D0%B0%D0%B3%D0%B0%D1%80%D0%B8*&title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&go=%D0%9F%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8 | intitle:Юр* intitle:Гагари* ]] >> returns 26 articles, Yuri Gagarin is the first in the list
2) searching for - https://ru.wikipedia.org/wiki/Феофан_Затворник
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?search=intitle%3A%D0%A4%D0%B5%D0%BE%D1%84%D0%B0*+intitle%3A%D0%97%D0%B0%D1%82%D0%B2%D0%BE%D1%80%D0%BD%D0%B8*&title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&go=%D0%9F%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8 | intitle:Феофа* intitle:Затворни* ]] >> the article is found
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?search=intitle%3A%D0%A4%D0%B5%D0%BE%D1%84%D0%B0%D0%BD*+intitle%3A%D0%97%D0%B0%D1%82%D0%B2%D0%BE%D1%80%D0%BD%D0%B8*&title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&go=%D0%9F%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8 | intitle:Феофан* intitle:Затворни* ]] >> ~~0 results~~ the article is found
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?search=intitle%3A%D0%A4%D0%B5%D0%BE%D1%84%D0%B0%D0%BD+intitle%3A%D0%97%D0%B0%D1%82%D0%B2%D0%BE%D1%80%D0%BD%D0%B8%D0%BA*&title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&go=%D0%9F%D0%B5%D1%80%D0%B5%D0%B9%D1%82%D0%B8 | intitle:Феофан intitle:Затворник* ]] >> the article is found
- **(captured in T94887)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%A4%D0%B5%D0%BE%D1%84%D0%B0%D0%BD+intitle%3A%D0%97*&fulltext=Search | intitle:Феофан intitle:З* ]] >> 0 results
- **(captured in T94904)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%22%D0%A4%D0%B5%D0%BE%D1%84%D0%B0%D0%BD+%D0%97%D0%B0%D1%82%D0%B2%D0%BE%D1%80%D0%BD%D0%B8*%22&fulltext=Search | "Феофан Затворни*" ]] >> 0 results
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%22%D0%A4%D0%B5%D0%BE%D1%84%D0%B0%D0%BD+%D0%97%D0%B0%D1%82%D0%B2%D0%BE%D1%80%D0%BD%D0%B8%D0%BA*%22&fulltext=Search | "Феофан Затворник*" ]] >> the article is found
3) searching for - https://ru.wikipedia.org/wiki/Иван_Грозный
- **(captured in T94893)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%D0%98%D0%B2%D0%B0%D0%BD+%D0%93%D1%80*&fulltext=Search | Иван Гр* ]] >> 4000+ articles found, the first in the list is https://ru.wikipedia.org/wiki/Гражданская_война_в_России ; no article about Ivan the Great (Иван Грозный) in first 500 results
- **(ok, but related to T94893)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%D0%98%D0%B2%D0%B0%D0%BD+%D0%93%D1%80%D0%BE*&fulltext=Search | Иван Гро* ]] >> 2600+ results, the article is found on the first place
- **(captured in T94887)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%98%D0%B2%D0%B0%D0%BD+intitle%3A%D0%93%D1%80*&fulltext=Search | intitle:Иван intitle:Гр* ]] >> 10 results, the article isn't found
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%98%D0%B2%D0%B0%D0%BD+intitle%3A%D0%93%D1%80%D0%BE*&fulltext=Search | intitle:Иван intitle:Гро* ]] >> now its ~~25~~ 24 results, the article is found on the first place
4) searching for - https://ru.wikipedia.org/wiki/Болотов,_Василий_Васильевич
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B2+%D0%92.+%D0%92.&fulltext=Search | Болотов В. В. ]] >> 10k+ results, the article is found on the first place due to the existing redirect
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B2+%D0%92+%D0%92&fulltext=Search | Болотов В В ]] >> 10k results, the article is found on the first place
- **(captured in T94893)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B2+%D0%92*+%D0%92*&fulltext=Search | Болотов В* В* ]] >> 10k results, the article is somewhere around 200th place in search results
- **(ok)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B2+%D0%92*+%D0%92*&fulltext=Search | intitle:Болотов В* В* ]] >> 147 results, the article is found on the first place
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE*+%D0%92*+%D0%92*&fulltext=Search | intitle:Болото* В* В* ]] >> ~~29 results, the article not found~~ the article is found in the sixth place
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE*+intitle%3A%D0%92*+intitle%3A%D0%92*&fulltext=Search | intitle:Болото* intitle:В* intitle:В* ]] >> ~~0 results~~ the article is found
- **(captured in T94908)** [[ https://ru.wikipedia.org/w/index.php?title=%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F%3A%D0%9F%D0%BE%D0%B8%D1%81%D0%BA&profile=default&search=intitle%3A%D0%91%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B2+intitle%3A%D0%92*+intitle%3A%D0%92*&fulltext=Search | intitle:Болотов intitle:В* intitle:В* ]] >> ~~3 results, the required article not found but the incorrect result is on the first place - https://ru.wikipedia.org/wiki/Болотов,_Валерий_Дмитриевич ~~ the article is the first of four results
1.: https://ru.wikipedia.org/wiki/Википедия:Форум/Технический#.D0.92.D0.B8.D0.BA.D0.B8.D1.81.D1.81.D1.8B.D0.BB.D1.8C.D1.89.D0.B8.D0.BA
2.: https://ru.wikipedia.org/wiki/MediaWiki:Gadget-wikilinker.js