1) Consider limiting to a .edu, .org, .gov.
Example: "great depression" tulare site:.edu in Google
Example: "athletic apparel" "labor issues" site:.org in Google
2) Consider searching for you topic with archive, collection, digital collection, library, special collection, transcript, oral history etc.
Example: "naval technology" library
Example: "great depression" california "digital collection"
3) Consider using Google Advanced Search
4) Topic internationally focused? Consider searching in another country's Google domain
5) Getting results you are not interested in? Remove results with specific keywords by using the minus sign
Example: "great depression" -kansas
