inurl:.gov - use inurl to specify a string of letters that should be found in the site's url, can use to limit to sites like .gov, .org, .edu, or foreign governments like .gov.uk
filetype:pdf - use to find specifc files like PDF's which are often reports
AROUND(X) - use to specify how close together your terms should be, replace X with the number of words that terms should appear within. Right now most government sites have a banner that references COVID making searching more difficult.
For example you can search < streets AROUND(10) covid inurl:.gov >