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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"rome economic conditions 19th b.c.-476 a.d.\") or (((((\"rome economic conditions we b.c.-476 a.d.\") OR (\"power economic conditions we b.c.-476 a.d.\"))) or (((((\"roman economic conditions 3 b.c.-476 a.d.\") or (\"roman economic conditions _ b.c.-476 a.d.\"))) or (\"roman economic conditions 7 b.c.-476 a.d.\"))))))~".
• Removing quotes may allow a broader search: (( rome economic conditions 19th b.c.-476 a.d. ) or ((((( rome economic conditions we b.c.-476 a.d. ) OR ( power economic conditions we b.c.-476 a.d. ))) or ((((( roman economic conditions 3 b.c.-476 a.d. ) or ( roman economic conditions _ b.c.-476 a.d. ))) or ( roman economic conditions 7 b.c.-476 a.d. ))))))~.
• Adding a wildcard symbol may retrieve word variants: (("rome economic conditions 19th b.c.-476 a.d.") or ((((("rome economic conditions we b.c.-476 a.d.") OR ("power economic conditions we b.c.-476 a.d."))) or ((((("roman economic conditions 3 b.c.-476 a.d.") or ("roman economic conditions _ b.c.-476 a.d."))) or ("roman economic conditions 7 b.c.-476 a.d."))))))*.