Perhaps you should try some spelling variations:
22historic buildings » historic buildings, _ historicbuildings, historical buildings
historic building » historic buildings, historical building, historical buildings
2f conservation » 20 conservation, 2.1 conservation, 2.2 conservation
sao tiago » san tiago, joao tiago, kato tiago
21 cape » 21 case, 11 cape, 21 cake
h2f a » h2o a, hpf a, h2s a
2f a » 2fa a, e2f a, 2 a
h2 a » h2o a, ch2 a, h2 ar

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 AND restoration %((off cape) OR (21 cape)) verde %((2f a) OR (((h2f a) OR (h2 a))))%cc%((83o tiago) OR (sao tiago)) island%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22historic buildings) or (historic building)) %2f conservation and restoration %((off cape) or (21 cape)) verde %((2f a) or (((h2f a) OR (h2 a))))%cc%((83o tiago) or (sao tiago)) island%22".
• Adding a wildcard symbol may retrieve word variants: %((22historic buildings) or (historic building)) %2f conservation and restoration %((off cape) or (21 cape)) verde %((2f a) or (((h2f a) OR (h2 a))))%cc%((83o tiago) or (sao tiago)) island%22*.