When you search google for a small phrase, for example, oauth authorization:
search query: oauth authorization
About 525,000 results
search query: oauth "authorization"
About 1,470,000 results
How does the result not only increase, but increase nearly three-fold?
I've always thought the quotes were meant to be more exact. For example, if you search for Web Design without the quotes, you will find results including web design and website design, but if you search for "Web Design" with the quotes, you will not find the entries that say "Website Design" so that reflects less results than the latter. So why am I seeing this oddity, does it make sense to anyone else?
Usually, the search phrase is hashed and the phrase sent to a backend server based on the hash. So 'oauth authorization' and 'oauth "authorization"' hash differently and get sent to different backend servers. These two calculate the 'number of results' figure differently, and hence you get the difference.
That is my guess at how you're seeing these numbers; I don't work for Google (but have some knowledge of another search engine).
Sorry, double quotes don't mean what they used to. We'll need to come up with something else for that.
At least "oauth authorization" seems to behave more normal.
oauth AROUND(3) authorization
Where do you find the fnlist + manpage? Is it possible to search for "foo <at most 3 words> bar"? Aka "around(3), but order matters".
oauth "authorization" looks for oauth, with "authorization" nearby, in the page.
So you will get more hits for the latter.