I can accept google search doing some trickery where it goes: Okay, I found nothing, or the few things I found seemed irrelevant, however, if I replace one of your words with something similar, or e.g. I take this one word you wrote and stick a space in between (not arbitrarily, also based on 'I observe that this one word is usually typed as two words in all the pages I scanned) - then I do get results.

In other words, not a blanket 'the results for this query suck, but if I just stick my fingers in my ears and completely ignore one your words I get much nicer results so why don't I show you those?' - but a more intelligent presumption.

With, of course, the option to force the search to show specifically what you exactly searched for with no such helpful alternatives applied.

I think what you described is what they already have with the "including results for [similar wording]" version of the results page. They also have a link to see the exact results.

However, as of right now they only offer it for actual typos/spelling mistakes (like your example with the missing space) as opposed to semantically similar wordings.

I definitely appreciate synonyms (which I may not otherwise consider, or at best have to think of one by one) and plurals being included by default.