Weird. I too have qBittorent installed and the Start menu search finds it as first option when I type 'bitt' ('bit' gives 64-bit Python launcher)... not too shabby.
"bitt" shows me zero results, but "bitto" (all the way to "bittorrent") works. It's beyond b0rked!
Same. And "torrent" returns no results at all. :/
Funny. "bitt" -> nothing. "bitto" -> works. "bitt" -> now works as well.
I have qBittorrent installed. For me searching "bitt" displays only "Battle.net", which is not even a valid match. hilarious.
Good catch, so if you type "bitto" then hit backspace to "bitt", it works, but hit backspace again ("bit") and it'll disappear (it even shows me "Notepad", because why not)!
At this point in this thread, I'm starting to hope someone reverse engineer windows search, and do a write-up of how the indexing, stemming and search actually works...