Perhaps you should try some spelling variations:
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• Performing a fuzzy search may retrieve terms with similar spellings: (("egyptology political and government 20th century.") or ((("egyptian political and government 1 century.") or ((("egypt political and government al century.") or ((("egypt political and government sale century.") OR ("egypt political and government half century."))))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("egyptology political and government 20th century.") OR ((("egyptian political and government 1 century.") OR ((("egypt political and government al century.") OR ((("egypt political and government sale century.") OR ("egypt political and government half century.")))))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"egyptology political and government 20th century.\") or (((\"egyptian political and government 1 century.\") or (((\"egypt political and government al century.\") or (((\"egypt political and government sale century.\") OR (\"egypt political and government half century.\"))))))))".
• Removing quotes may allow a broader search: (( egyptology political and government 20th century. ) or ((( egyptian political and government 1 century. ) or ((( egypt political and government al century. ) or ((( egypt political and government sale century. ) OR ( egypt political and government half century. )))))))).
• Adding a wildcard symbol may retrieve word variants: (("egyptology political and government 20th century.") or ((("egyptian political and government 1 century.") or ((("egypt political and government al century.") or ((("egypt political and government sale century.") OR ("egypt political and government half century."))))))))*.