Lose the quotation marks and you’ll get a bunch of hits. When you use quotes you are effectively eliminating about 80% of the Boolean logic gates that comprise the algorithm that primarily drives Google’s Search engine. Google is so good that it knows when a search topic, like the one you used as an example in your OP, is basically meaningless since it is so common. It needs context, in other words. It’s “GIGO” all over again! Don’t blame Google. Rather, as tech guys sometimes say…“PBK.”
Yes, he does know how. He wants a phrase, so he encloses his phrase in quotation marks. If he was looking for “a bunch of hits” that contain “a bunch of words” in no particular pattern, he knows how to do that, too. But it would be of no relevance to his question.
What makes you think that phrase should somehow return a result (in quotation marks)? All the kids are saying it these days? Or what? It’s the title of your favorite Walt Whitman poem?
Or put another way, Google is good enough that it doesn’t identify the phrase itself–as a specific phrase, i.e., in quotation marks–as occurring enough to demonstrate any connection to a linguistic community of practice.
The premise of the OP is comparing apples with oranges.
Google doesn’t make exhaustive exact-text matches across their entire database, and they further index pages by internally generated keywords. In all likelihood, when you do a quoted search Google breaks down the terms, does a “normal” search for the keywords, and only highlights the matching phrase in the results after the fact.
The key to why Google can handle so much data is that their search algorithm is a “fuzzy” search that allows for false negatives. Google ranks relevance including factors such as how often a page is linked to, the surrounding terms, how often it is visited, and other factors they keep proprietary, even further weighted by your own search history. So, it’s not unexpected Google would fail to find an obscure phrase on a barely-visited page.
Can you give me an example of a sentence fragment that exists on a website indexed by Google, that doesn’t show in a search result when you Google that exact phrase/sentence fragment?