Generally, no search results are shown. This is visible e.g. in the example below
a.) In the advancedSearch form:
Write: This is the central wiki
into the "these words" field
---> No results
b.) In the general serach box:
Write: This is the central wiki
---> there are results
Weirdly enough on our text wiki, you have results in both cases (but there you should use the phrase "Hilfe zur Benutzung und Konfiguration" so that something can be found ;) )
Example Links:
- Not working advanced search https://deployment.wikimedia.beta.wmflabs.org/w/index.php?title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearchOption-filetype=&advancedSearch-current=%7B%22options%22%3A%7B%22plain%22%3A%22This+is+the+central+wiki%22%7D%2C%22namespaces%22%3A%5B%220%22%5D%7D&ns0=1
- Working regular search https://deployment.wikimedia.beta.wmflabs.org/w/index.php?search=This+is+the+central+wiki&title=Special:Search&go=Go&searchToken=5qur4x49r8j8wb2b9lofwt32x