Domain related search:
site:example.org
Excluding sub domains:
site:example.org -site:www.example.org
Example of search in title, in URL and exclude a file type:
intitle:"netbotz appliance" "OK" -filetype:pdf intitle:"SpeedStream Router Management Interface" inurl:"level/15/exec/-/show" "# -FrontPage-" filetype:pwd inurl:(services|authors|administrators|users)
Google Hacking Database