Perhaps you should try some spelling variations:
historical building » historical buildings, historical thinking
2.1 conservation » 21 conservation, 11 conservation, 2.1 construction
2f conservation » 20 conservation, 2.2 conservation, 2.7 conservation
tobago island » tobago iceland, tobago ireland, fogo island
tiago island » sado island, two island, bioko island
2f sa » 2f a
historic » histories
historical » historiesal

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: %((historic buildings) OR (historical building)) %((2f conservation) OR (2.1 conservation)) AND restoration %((off cape) OR (21 case)) verde %2f sa%cc%83o ((tiago island) OR (tobago island))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((historic buildings) or (historical building)) %((2f conservation) OR (2.1 conservation)) and restoration %((off cape) or (21 case)) verde %2f sa%cc%83o ((tiago island) or (tobago island))%22".
• Adding a wildcard symbol may retrieve word variants: %((historic buildings) or (historical building)) %((2f conservation) OR (2.1 conservation)) and restoration %((off cape) or (21 case)) verde %2f sa%cc%83o ((tiago island) or (tobago island))%22*.