Perhaps you should try some spelling variations:
historical building » historical buildings, historic buildings, historical thinking
20 conservation » 10 conservation, 2.1 conservation, 9 conservation
11 cape » 11 case, 11 care, 11 came
2f sa » 2f a

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: %((_ historicbuildings) OR (historical building)) %20 conservation AND restoration %((((off cape) OR (11 cape))) OR (21 case)) verde %2f sa%cc%83o (sado OR sao) island%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((_ historicbuildings) or (historical building)) %20 conservation and restoration %((((off cape) or (11 cape))) or (21 case)) verde %2f sa%cc%83o (sado OR sao) island%22".
• Adding a wildcard symbol may retrieve word variants: %((_ historicbuildings) or (historical building)) %20 conservation and restoration %((((off cape) or (11 cape))) or (21 case)) verde %2f sa%cc%83o (sado OR sao) island%22*.