Google search tips

Google search tips
1. Using Google to search only one site
site:jiansenlu.blogspot.com
2. search only swf files or only one file type
filetype:swf
3. Search exactly a word using double quote
"PHP programmer"
4. Exclude a word using dash
"PHP programmer", -Java
5. Using search tools
for example after typing "PHP programmer"  and search
you can find search tools to search only in a country,
location, specific  time range, blog search etc
Reference:
http://support.google.com/websearch/answer/136861