Earlier quoted context omitted.
"Quote" the search term. That's the replacement for +.
I'm not sure if my memory is playing tricks on my, but I've found quotes unreliable. Google will spit out "close" suggestions that have nothing to do with what I requested, despite using quotes. Google also happily returns results which do not fulfill even the "close" suggestions: e.g. I ask for three words, Google searches for those three words, and returns a bunch of pages that contain only two or one of those word…
I noticed the same a few months ago. If you want an exact match you have to click on "Search tools" >> "All results" >> "Verbatim".