Maybe from version 7.x it's really hard to find correct results in the docs. Here one example :
If I'm in the elasticsearch version 7.6 documentation page:
and I search for the keyword "match_phrase" in the search bar no result match where I expect to have this page:
Another search is with keyword "boolean", "sort", "boost" which return results for painless doc. Where I expect to return result from the elasticsearch doc not the painless doc, as I'm the elasticsearch documentation page.
Maybe my search are not common, what I try to do is searching for some example to post on stackoverflow or forum for reference.
You may certainly have some logs that show you other example.