For more technical searches, Google has become next to useless for me.

Same here. I used to have corrections for java -> javascript but that seems to have been fixed.

Just this morning I tried searching for this:

   µC/gui button detach

... "detach" gets corrected to "remove" and "disconnect", resulting in useless links. The top 2 links are general features overview pages.

Which is odd, because googling this:

   button detach

results in lots of uncorrected queries for event delegation. You'd think that adding "µC/gui" would narrow the context, but no.