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• Performing a fuzzy search may retrieve terms with similar spellings: (((("roman economic conditions 1250 b.c.-476 a.d.") or ((((("roman economic foundations 1250 b.c.-476 a.d.") OR ("roman economic foundations 1200 b.c.-476 a.d."))) or ("roman economy conditions 1900 b.c.-476 a.d."))))) or ("home economics condition 30 b.c.-476 a.d."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("roman economic conditions 1250 b.c.-476 a.d.") OR ((((("roman economic foundations 1250 b.c.-476 a.d.") OR ("roman economic foundations 1200 b.c.-476 a.d."))) OR ("roman economy conditions 1900 b.c.-476 a.d."))))) OR ("home economics condition 30 b.c.-476 a.d.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"roman economic conditions 1250 b.c.-476 a.d.\") or (((((\"roman economic foundations 1250 b.c.-476 a.d.\") OR (\"roman economic foundations 1200 b.c.-476 a.d.\"))) or (\"roman economy conditions 1900 b.c.-476 a.d.\"))))) or (\"home economics condition 30 b.c.-476 a.d.\"))".
• Removing quotes may allow a broader search: (((( roman economic conditions 1250 b.c.-476 a.d. ) or ((((( roman economic foundations 1250 b.c.-476 a.d. ) OR ( roman economic foundations 1200 b.c.-476 a.d. ))) or ( roman economy conditions 1900 b.c.-476 a.d. ))))) or ( home economics condition 30 b.c.-476 a.d. )).
• Adding a wildcard symbol may retrieve word variants: (((("roman economic conditions 1250 b.c.-476 a.d.") or ((((("roman economic foundations 1250 b.c.-476 a.d.") OR ("roman economic foundations 1200 b.c.-476 a.d."))) or ("roman economy conditions 1900 b.c.-476 a.d."))))) or ("home economics condition 30 b.c.-476 a.d."))*.