For me the idea that poor quality search results are a bug muddies the idea of what a bug is. It's like saying the colour of the paint in my living room is buggy because I don't like it. It might be an ugly colour that I don't like, but it is what it is. A bug would be if the colour doesn't match what was shown on the tin.
> If the search bears little connection to what was searched for, then it is a bug, as far as the user is concerned.
So if I search for A, and I get results for B instead (where B has only the slightest connection to A), it is not a bug?
What about if B has no connection to A whatsoever? Still not a bug? If it is not, then we may have discovered a software domain (the first for me I should say) where bugs are not possible. Should a be a nice market to launch products for, then.
> So if I search for A, and I get results for B instead (where B has only the slightest connection to A), it is not a bug?
It depends. There could be a bug in the system like query = query.replace(A,B), or it could be that there are no good results for A. Returning nonsense results is a bad design, but not necessarily a bug.
I guess my underlying point is that bugs are about software not conforming to some specified behaviour, and trying to specify behaviour like "i should type in a search and get great results" is too loose of a spec to be meaningful so we should avoid saying things which don't meet that criteria are bugs. To use a concrete example, perhaps the set of search results returned for a query look useless to you but are actually useful for someone else.
Compare that with something like a calculator app where part of the spec is "Must handle integer addition with for inputs i,j where -10,000 <= i <= 10,000 and -10,000 <= j <= 10,000". Then if in your calculator you do 1+1 and get 3, then that is clearly a bug per the spec.
Bugs vs. bad design is a useful distinction to make imo.
> If the search bears little connection to what was searched for, then it is a bug, as far as the user is concerned.
A bad product perhaps, but not a bug.