just noticed something strange due to some fast/poor typing on my part.
If I do a site:www.somedomain.com -asdf (put any major corporate domain here - but for this example I replaced microsoft with "somedomain" which shows a very drastic result in this test because it has so many pages indexed)
I will get results of 295,000 pages.
But if I type in site:www.somedomain.com -asdf-asdf I will get 441,000 pages.
and if I add another -asdf to the end again to make the query site:www.somedomain.com -asdf-asdf-asdf I get 585,000 pages.
Obviously this query is extremely artificial but I'm wondering if it's a bug or if that's what multiple "-" signs means tied together like that. I've never seen another query where google would count the same pages over and over like this one appears to do.