Why? Google is lousy for searching forums unless you're searching for an exact phrase.
Google does not have any direct concept of separation between posts. It can only approximate "search for these keywords in one single post" by preferring keywords that are in close proximity.
“Compleχity is a symptom of confusion, not a cause.” —Jeff Hawkins
“The egg hatched...” “...the egg hatched... and a hundred baby spiders came out...”