Perhaps you should try some spelling variations:
2.2 conservation » 22 conservation, 1.2 conservation, 10.2 conservation
2f conservation » 20 conservation, 21 conservation, 2.1 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: %((_ historicbuildings) OR (historic buildings)) %((2f conservation) OR (2.2 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: "%((_ historicbuildings) or (historic buildings)) %((2f conservation) OR (2.2 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: %((_ historicbuildings) or (historic buildings)) %((2f conservation) OR (2.2 conservation)) and restoration %off (cape or case) verde %2f sa%cc%83o ((tiago island) or (sado island))%22*.