Here is my example query: "station box" AND Helsinki
If I try this search on English Wikipedia I get 'Helsinki Metro' as result with LuceneSearch, but no results with CirrusSearch.
The wiki text contains this: "Two [[station box]]es were constructed in Hakaniemi."
Stemming in phrase searches in LuceneSearch was a bug, but now I have code that depends on this bug.
I found that Bug 54020, requested this change, disabling stemming in phrase matches.
It would be useful if it were possible to use CirrusSearch to search for terms next to each, like a phrase search, but with stemming. The syntax doesn't need to be the same as LuceneSearch. Stemming in phrase matching could be a tick box in advanced search and/or an extra parameter in the search API.