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
tiago island » tobago island, sado island, bioko island
two island » two islands, two land
21 cape » 21 case, 21 cake, 21 cap
11 cape » 11 case, 11 care, 11 came
2f a » 2fa a, e2f a, h2f 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)) %2.1 conservation AND restoration %((off cape) OR (((21 cape) OR (11 cape)))) verde %((2f sa) OR (2f a))%cc%83o ((tiago island) OR (two island))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22historic buildings) or (historic building)) %2.1 conservation and restoration %((off cape) or (((21 cape) or (11 cape)))) verde %((2f sa) OR (2f a))%cc%83o ((tiago island) or (two island))%22".
• Adding a wildcard symbol may retrieve word variants: %((22historic buildings) or (historic building)) %2.1 conservation and restoration %((off cape) or (((21 cape) or (11 cape)))) verde %((2f sa) OR (2f a))%cc%83o ((tiago island) or (two island))%22*.