Perhaps you should try some spelling variations:
"rand corporation biography series" » "rand reformation biography series", "rand federation biography series", "rand corporate geography series", "said corporation biography series", "road corporation biography series", "a corporation biography series", "rand corporation biography pericles", "rand corporation biography sermons", "rand corporation biography herve"
"rand corporation biography sources" » "rand reformation biography sources", "rand federation biography sources", "rand corporate geography sources", "rand corporation bibliography resources", "said corporation biography sources", "road corporation biography sources", "a corporation biography sources"
"a corporate biography studies" » "a corporate geography studies", "a corporate demography studies", "a complete biography studies", "a corporate angiography studies", "a corporate radiography studies", "a corporate tomography studies"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("rand corporation biography series") OR ("rand corporation biography sources"))) OR ("a corporate biography studies")).
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• Adding a wildcard symbol may retrieve word variants: (((("rand corporation biography series") or ("rand corporation biography sources"))) or ("a corporate biography studies"))*.