Perhaps you should try some spelling variations:
transport fuel » transport fares
gases transfer » mass transfer, based transfer, gas transfer
sea transport » road transport, bus transport
areas two » areas co
guias de » guia de, guide de, aguas de
de gases » de bases, _ gases, f gases
two sea » two sex, two step, two self
3 ao » 3 a, 3 co, 3 ai
3 do » _ do, 3 d, 1 do

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: (( areas two sea transport fuel _ ) OR ( guias de gases transfer ((3 ao) OR (3 do)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas two sea transport fuel _ ) or ( guias de gases transfer ((3 ao) OR (3 do)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas two sea transport fuel _ ) or ( guias de gases transfer ((3 ao) OR (3 do)) ))*.