Perhaps you should try some spelling variations:
historical buildings » historic buildings
historic building » historic buildings, historical building, story building
2f conservation » 20 conservation, 21 conservation, 2.1 conservation
2f cape » 2 cape, off cape
21 cape » 21 case, 11 cape, 21 cake
2fa a » dfa a, 2fa _, 20a a
2f a » e2f a, h2f a, 2 a
sado » sardo, saldo, sao

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22((historic building) OR (historical buildings))s) OR (((historic building) OR (historical buildings)))) %2f conservation AND restoration %((2f cape) OR (21 cape)) verde %((2f sa) OR (((2f a) OR (2fa a))))%cc%83o sado island%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22((historic building) or (historical buildings))s) or (((historic building) or (historical buildings)))) %2f conservation and restoration %((2f cape) or (21 cape)) verde %((2f sa) or (((2f a) OR (2fa a))))%cc%83o sado island%22".
• Adding a wildcard symbol may retrieve word variants: %((22((historic building) or (historical buildings))s) or (((historic building) or (historical buildings)))) %2f conservation and restoration %((2f cape) or (21 cape)) verde %((2f sa) or (((2f a) OR (2fa a))))%cc%83o sado island%22*.