Perhaps you should try some spelling variations:
economic foundations » economic conditions (Expand Search), economic relations (Expand Search)
economic locations » economic relations (Expand Search), economic notions (Expand Search), economic implications (Expand Search)
economy conditions » economic conditions (Expand Search), economic connections (Expand Search)
economic location » economic education (Expand Search), economic association (Expand Search), economic relations (Expand Search)
foundations 1150 » conditions 1150 (Expand Search), foundation 1890 (Expand Search), foundations 3000 (Expand Search)
conditions 40 » conditions 640 (Expand Search), conditions 160 (Expand Search), conditions _ (Expand Search)
transition 30 » transition 3 (Expand Search), transition _ (Expand Search), transition i (Expand Search)
transition a » transition _ (Expand Search), transitions _ (Expand Search), translation a (Expand Search)
transition 6 » transition _ (Expand Search), transition 3 (Expand Search), transition i (Expand Search)
locations _0 » locations _ (Expand Search), locutions _ (Expand Search), relocations _ (Expand Search)
1150 b.c » 1100 b.c (Expand Search), 1250 b.c (Expand Search), 1550 b.c (Expand Search)
_0 b.c » 30 b.c (Expand Search), 10 b.c (Expand Search), 50 b.c (Expand Search)
40 b.c » 480 b.c (Expand Search), 404 b.c (Expand Search), 30 b.c (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( rome's economic location _ b.c.-476 a.d. ) or ((((( roman economic locations _0 b.c.-476 a.d. ) or ( roman economic ((((transition 30) OR (transition 6))) or (transition a)) b.c.-476 a.d. ))) or ((( roman economy conditions 40 b.c.-476 a.d. ) or ( roman economic foundations 1150 b.c.-476 a.d. ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( rome's economic location _ b.c.-476 a.d. ) OR ((((( roman economic locations _0 b.c.-476 a.d. ) OR ( roman economic ((((transition 30) OR (transition 6))) OR (transition a)) b.c.-476 a.d. ))) OR ((( roman economy conditions 40 b.c.-476 a.d. ) OR ( roman economic foundations 1150 b.c.-476 a.d. )))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( rome's economic location _ b.c.-476 a.d. ) or ((((( roman economic locations _0 b.c.-476 a.d. ) or ( roman economic ((((transition 30) OR (transition 6))) or (transition a)) b.c.-476 a.d. ))) or ((( roman economy conditions 40 b.c.-476 a.d. ) or ( roman economic foundations 1150 b.c.-476 a.d. ))))))".
• Adding a wildcard symbol may retrieve word variants: (( rome's economic location _ b.c.-476 a.d. ) or ((((( roman economic locations _0 b.c.-476 a.d. ) or ( roman economic ((((transition 30) OR (transition 6))) or (transition a)) b.c.-476 a.d. ))) or ((( roman economy conditions 40 b.c.-476 a.d. ) or ( roman economic foundations 1150 b.c.-476 a.d. ))))))*.