With Google Advanced Search you can easily use tools such as domain limiters (edu, gov, org). You can also type in an advanced search directly into the Google search box, for example "home health care" site:gov.
Google Search Statement
Default Boolean AND search (it looks at the word residential AND the word segregation).
It looks at the words as an exact phrase
The phrase must be in the title.
intitle:"residential segregation" inurl:npr
"residential segregation" would be in the title and the site (URL) will be NPR
intitle:"residential segregation" site:.edu
Site must be an educational institution.
intitle:"residential segregation" income site:.edu
The word income is added to the previous search.
"residential segregation" site:.edu filetype:pdf
Site must be a pdf from an educational institution. You might also try something like filetype:ppt