Use quotation marks to search as a phrase
Use "+" before a term to make it required (Otherwise results matching only some of your terms may be included)
Use "-" before a word or phrase to exclude
Use "OR", "AND", and "NOT" (must be capitalized) to create complex boolean logic
You can use parentheses in your complex expressions
Truncation and wildcards are not supported

This Search	Will Find
“Montgomery Bus Boycott”	Records that have the exact phrase Montgomery Bus Boycott
Albany OR Augusta +integration	Records with the word integration that also contain the words Albany and/or Augusta
King -Martin	Records with the name King but not the name Martin
“Freedom Rides” AND Carter	Records containing the phrase “Freedom Rides” and the name Carter
Selma AND (Lewis OR Williams)	Records containing the words Selma and Lewis or Selma and Williams

[Letter from John J. Herrera to Harvey Rosenberg - 1953-12-01]