To be fair, back in the day you could get better results by relying on Google with site:foobar
and the Boolean/“power user” stuff. A lot of built-in search boxes on sites were a bit dodgy, or at least less flexible than AND/OR/NOT and other “power user tricks”.
Of course, these days those seem to be ignored wholesale and even “verbatim quotes” are an utter crapshoot, this was back when Google didn’t fucking blow.
“site” does work still, I think, just plus a lot of irrelevant drivel - standard Google fare, you see it on Youtube too.
I’d consider the most basic case to be, specifically, the “quotes for verbatim results”, which definitely do not work anymore. Neither does + for a positively (hue hue) required term, a close second.