Perhaps you should try some spelling variations:
economic foundations » economic conditions (Expand Search), economic relations (Expand Search)
economy conditions » economic conditions (Expand Search), economic connections (Expand Search)
economic condition » economic conditions (Expand Search), economic connections (Expand Search), economic transition (Expand Search)
economic location » economic education (Expand Search), economic association (Expand Search), economic relations (Expand Search)
foundations 3000 » foundations 3 (Expand Search), foundations _ (Expand Search), foundation 1890 (Expand Search)
conditions 160 » conditions 1150 (Expand Search), conditions 640 (Expand Search), conditions 19th (Expand Search)
conditions 43 » conditions 3 (Expand Search), conditions 640 (Expand Search), conditions _ (Expand Search)
conditions 40 » conditions 640 (Expand Search), conditions _ (Expand Search), conditions de (Expand Search)
condition 31 » condition 3 (Expand Search), condition _ (Expand Search), condition de (Expand Search)
location 3 » location _ (Expand Search), location 1 (Expand Search), locations _ (Expand Search)
3000 b.c » 300 b.c (Expand Search), 3000 bc (Expand Search), 1000 b.c (Expand Search)
160 b.c » 1560 b.c (Expand Search), 1360 b.c (Expand Search), 1600 b.c (Expand Search)
31 b.c » 30 b.c (Expand Search)
43 b.c » 63 b.c (Expand Search)
40 b.c » 480 b.c (Expand Search), 404 b.c (Expand Search), 30 b.c (Expand Search)
3 b.c » 30 b.c (Expand Search), 63 b.c (Expand Search), 73 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 condition 31 b.c.-476 a.d. ) or ((((( roman economic foundations 3000 b.c.-476 a.d. ) or ( roman economic location 3 b.c.-476 a.d. ))) or ((( roman economy conditions 43 b.c.-476 a.d. ) or ((( roman economy conditions 40 b.c.-476 a.d. ) OR ( roman economy conditions 160 b.c.-476 a.d. ))))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( rome's economic condition 31 b.c.-476 a.d. ) OR ((((( roman economic foundations 3000 b.c.-476 a.d. ) OR ( roman economic location 3 b.c.-476 a.d. ))) OR ((( roman economy conditions 43 b.c.-476 a.d. ) OR ((( roman economy conditions 40 b.c.-476 a.d. ) OR ( roman economy conditions 160 b.c.-476 a.d. )))))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( rome's economic condition 31 b.c.-476 a.d. ) or ((((( roman economic foundations 3000 b.c.-476 a.d. ) or ( roman economic location 3 b.c.-476 a.d. ))) or ((( roman economy conditions 43 b.c.-476 a.d. ) or ((( roman economy conditions 40 b.c.-476 a.d. ) OR ( roman economy conditions 160 b.c.-476 a.d. ))))))))".
• Adding a wildcard symbol may retrieve word variants: (( rome's economic condition 31 b.c.-476 a.d. ) or ((((( roman economic foundations 3000 b.c.-476 a.d. ) or ( roman economic location 3 b.c.-476 a.d. ))) or ((( roman economy conditions 43 b.c.-476 a.d. ) or ((( roman economy conditions 40 b.c.-476 a.d. ) OR ( roman economy conditions 160 b.c.-476 a.d. ))))))))*.