When searching Google for a website with a specific domain, such as a .gov or .edu, type in your search terms then add "site:" and the domain type at the end of your search term. For example, if you want to find government websites on gun control, type in "gun control site:.gov". Or if you wanted to specifically search for non-profit websites that had information on wildlife, type in "wildlife site:.org".
Use to specify website domain when searching, such as .gov sites for government information
LibKey Nomad connects you to articles in Google Scholar, PubMed, Wikipedia, and other sites through journals subscribed to Chaffey College Library. Download the LibKey Nomad extension in your browser, then select Chaffey College as your organization. Once installed, look for the LibKey Icon at the bottom left of the page. 
For more help, see this video.