Perhaps you should try some spelling variations:
22historic buildings » historic buildings, _ historicbuildings, historical buildings
historic building » historic buildings, historical building, historical buildings
2.1 conservation » 21 conservation, 11 conservation, 2.1 construction
2f conservation » 20 conservation, 2.2 conservation, 2.7 conservation
tiago island » tobago island, two island, bioko island
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)) %((2f conservation) OR (2.1 conservation)) AND restoration %off (cape OR case) 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)) %((2f conservation) OR (2.1 conservation)) and restoration %off (cape or case) verde %2f sa%cc%83o ((tiago island) or (sado island))%22".
• Adding a wildcard symbol may retrieve word variants: %((22historic buildings) or (historic building)) %((2f conservation) OR (2.1 conservation)) and restoration %off (cape or case) verde %2f sa%cc%83o ((tiago island) or (sado island))%22*.