Example Code:
People often use these three kinds of search::
Link popularity is Link: to the site
MSN ------link:
Altavista--link:
Yahoo-----linkdomain:
Google----link:
Site popularity is From the site:
MSN ------site:
Altavista--site:
Yahoo-----site:
Google----site:
Term popularity is Contain the "term "
MSN ------ "keyterm"
Altavista-- "keyterm"
Yahoo----- "keyterm"
Google---- "keyterm"
http://link.ezer.com/tools/ ---- has example
link:+space is not from the site but similar to term only
so if you want term popularity only you better use " term " to search
space will become + sign and make your domain become a term but not a site
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