I hear you. How to indicate to the user that we don't think there are any good matches for their query is something we debate and experiment with in search quality at Google.
FYI, the + prefix operator was deprecated a few years ago. There was always an equivalent way to express it, by putting "each" "word" "in" "quotes". I know that's more keypresses than the + sign, but when maintaining a system as gigantic and complex as the Google search engine, everything is tradeoffs, and that's one that we decided to make.
FYI, the + prefix operator was deprecated a few years ago. There was always an equivalent way to express it, by putting "each" "word" "in" "quotes". I know that's more keypresses than the + sign, but when maintaining a system as gigantic and complex as the Google search engine, everything is tradeoffs, and that's one that we decided to make.