I think it’s primarily for people copying and pasting something like an error message, which may have user-specific data in quotes. That should be what “not many results for...” is for, but Google is always trying to optimize away those clicks. Maybe they could add a “programatic” search feature with documented syntax for power users.

Use 'verbatim'. It's a drop down option, and it isn't as good as the old + or other operators (deprecated because of Google Plus). For example, with verbatim you can't only + one single thing in a search.

Regardless, I basically just always search with verbatim on. Google is mostly useless otherwise.