Split from T252891
MediaSearch displays many suggestions that fetch no results.
(1) Several suggestions are displayed for "Baroque music for the British isles" - none of them will fetch results
(2) The searches that displayed no results (no suggestions) would display suggestions when a user starts adjusting them (deleting some of the words) - and none of the suggestions in the example below would fetch results.
The search https://commons.wikimedia.org/wiki/Special:MediaSearch?type=bitmap&q=Evidence+that+tristetraprolin+binds+to+AU-rich+elements+and+promotes+the+deadenylation+and+destabilization+of+tumor+necrosis+factor+alpha+mRNA won't have any suggestions on enwiki, but there will be quite few suggestions on commons.