I don't have an example query ready for you. I'll often see the problem when I include error messages, media titles, or model numbers in my searches, none of which have synonyms. Google will arbitrarily ignore at least one term, often silently.
I don't take issue with spellcheck or even synonym suggestions, FWIW. It's that the results which include/are relevant to specifically requested terms appear below results that don't/aren't, sometimes way below. It hasn't always been this way but I can't pinpoint when results started getting worse.
But that's easy to fix by putting in quotes. And Google will often highlight next to a search result "doesn't include <search term>", which you can click and Google will add the quotes for you.
If you put all terms in quotes, Google generally won't ignore anything. It will tell you it couldn't find any results though, quite frequently.
I don't take issue with spellcheck or even synonym suggestions, FWIW. It's that the results which include/are relevant to specifically requested terms appear below results that don't/aren't, sometimes way below. It hasn't always been this way but I can't pinpoint when results started getting worse.