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