In that case, click the "must contain" link and it resubmits with the query wrapped in quotes. Or, just quote the query yourself on the first go if you know it must match
Google no longer (hasn't in a while) respected quotes. It's very hard to get Google to actually say there aren't any results even when in fact there are no matching results.
They respect it when they submit it then, as every time I've used that function to see them update the query with quotes it comes back with different results. I've never cared to look at the search query in the URL, so maybe they also add and additional parameter that tells the back end specifically to obey the quotes on this resubmitting???? So at some point, the quotes aren't ignored
on the advanced search, there's still the option to specify that it 'must contain' something, but I'm not sure if it's just a suggestion like quotes or not.
I "love" how we've reached a point where we so distrust this company specifically but dark pattern UIs in general where we almost anticipate placebo like buttons.