Perhaps you should try some spelling variations:
22historic buildings » historic buildings, _ historicbuildings, historical buildings
historic building » historic buildings, historical building, historical buildings
21 conservation » 2.1 conservation, 11 conservation, 1 conservation
20 conservation » 10 conservation, 2.1 conservation, 9 conservation
tiago island » tobago island, two island, bioko island
21 cape » 21 case, 11 cape, 21 cake
2f cape » 2 cape, off cape
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: %((22historic buildings) OR (historic building)) %((21 conservation) OR (20 conservation)) AND restoration %((2f cape) OR (21 cape)) verde %2f sa%cc%83o ((tiago island) OR (sado island))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22historic buildings) or (historic building)) %((21 conservation) or (20 conservation)) and restoration %((2f cape) OR (21 cape)) verde %2f sa%cc%83o ((tiago island) or (sado island))%22".
• Adding a wildcard symbol may retrieve word variants: %((22historic buildings) or (historic building)) %((21 conservation) or (20 conservation)) and restoration %((2f cape) OR (21 cape)) verde %2f sa%cc%83o ((tiago island) or (sado island))%22*.