Let me get straight to the point. It seems like the Boolean operator AND – that is supposed to be implied – now does make a difference on Google.
Compare, for example,
with
digital games AND advertising Nyc | new-york “account manager ” intitle:resume OR inurl:resume -jobs
(this is the search I happen to run at the moment; I don’t use AND’s in my practice but tried them per a student’s suggestion).
I am going to explore this. My preliminary advice to you is to stop using AND in your searches.