I hate when searches parse like that. Ideally coffee shop, coffee shops, coffee, cafe, espresso, etc. should all give me the same exact results: 100% of the stores in the area that sell coffee.

I don't think there's a single piece of mapping software that doesn't suck hard in some way. It's pretty annoying how google maps shows you x number of results zoomed out, y zoomed in, and z with the map frame moved half a block to the left.

Just show me everything. Search the entire city. Flood my map. Let me do the vetting, that's what I came to maps to do anyway.

where the sets of y and z might not even overlap

This shows that they are probably not even doing stemming which shouldn't be that hard to implement and could have great benefit/cost