**Steps to replicate the issue** (include links if applicable):
**Background**
RW question – how many articles about viruses also have separate articles about the virus infection (e.g., [[ https://en.wikipedia.org/wiki/Andes_virus | Andes virus ]] *and* [[https://en.wikipedia.org/wiki/Andes_virus_infection | Andes virus infection ]]) ?
* search for articles about virus infections using dual `intitle` terms: [[https://en.wikipedia.org/w/index.php?limit=500&go=Go&search=intitle%3Avirus+intitle%3Ainfection&title=Special%3ASearch&profile=default | intitle:virus intitle:infection ]] = 24 articles ( + 39 redirects)
**What happens?**:
* Notice: among the top ten results not involving a redirect, seven do not have theboth term 'infection's in the title
*- viz.: six without 'infection': 'Respiratory syncytial virus', 'B virus', 'Epstein–Barr virus', 'Ross River virus', 'Vertically transmitted infection''Virus latency', 'Ross Riverand 'Marburg virus',s disease'; 'Virus latency'and one does not have 'virus', 'Marburg virus disease'i.e. 'Vertically transmitted infection'.
**What should have happened instead?**:
* All non-redirect results should have both terms in the title, like the three valid results returned:
*- viz.: 'Epstein–Barr virus infection', 'Nipah virus infection', 'Human papillomavirus infection' (it's not clear if the last one should have been returned, as 'virus' is [[https://www.mediawiki.org/wiki/Help:CirrusSearch#Words,_phrases,_and_modifiers | not a subword ]] of that title)