After you've tried a search you can limit by selecting the Google gear
- then select Advanced search
- Scroll down to Narrow your results by and limit your search by producer type, select site or domain:
- .gov, for U.S. Government
- .ca.gov for California government
- .org, for non-profit organization
- .edu for a college or university in the United States
- .mil for U.S. military server
You can also do this right in the search bar by typing site:
For example site:edu or site:ca.gov or 
