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• Performing a fuzzy search may retrieve terms with similar spellings: (("rome's economic condition de b.c.-476 a.d.") or ((((((("roman economic conditions 70 b.c.-476 a.d.") OR ("roman economic connectionss 70 b.c.-476 a.d."))) or ("roman economic conditions _ b.c.-476 a.d."))) or ("roman economy conditions de b.c.-476 a.d."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("rome's economic condition de b.c.-476 a.d.") OR ((((((("roman economic conditions 70 b.c.-476 a.d.") OR ("roman economic connectionss 70 b.c.-476 a.d."))) OR ("roman economic conditions _ b.c.-476 a.d."))) OR ("roman economy conditions de b.c.-476 a.d.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"rome's economic condition de b.c.-476 a.d.\") or (((((((\"roman economic conditions 70 b.c.-476 a.d.\") OR (\"roman economic connectionss 70 b.c.-476 a.d.\"))) or (\"roman economic conditions _ b.c.-476 a.d.\"))) or (\"roman economy conditions de b.c.-476 a.d.\"))))".
• Removing quotes may allow a broader search: (( rome's economic condition de b.c.-476 a.d. ) or ((((((( roman economic conditions 70 b.c.-476 a.d. ) OR ( roman economic connectionss 70 b.c.-476 a.d. ))) or ( roman economic conditions _ b.c.-476 a.d. ))) or ( roman economy conditions de b.c.-476 a.d. )))).
• Adding a wildcard symbol may retrieve word variants: (("rome's economic condition de b.c.-476 a.d.") or ((((((("roman economic conditions 70 b.c.-476 a.d.") OR ("roman economic connectionss 70 b.c.-476 a.d."))) or ("roman economic conditions _ b.c.-476 a.d."))) or ("roman economy conditions de b.c.-476 a.d."))))*.