Well whether you add “site:.edu” or not, Google still does the thing where they just spit out a pile of extra “matches” that don’t contain your search phrase AT ALL . Just thrown into the list, as if they have any business being there (oh wait, they do have business: Google’s business). Frankly, if it’s not reliable as a tool, it has no real value and I can’t believe it has come to this. Imagine if every time you ran…
But anyway, this is the behaviour I think people are being trained to expect from searches. I sometimes have to show new users our business systems (which manage residential property data) and it's seen as a drag that you have to have some level of precision when searching for anything.
It's like a spellchecker. As they've got better over time you can be less and less accurate with words you're not quite sure on and they still find the word you meant.