Perhaps you should try some spelling variations:
mass transport » gas transport, mass transit, bus transport
transport file » transport fare, transport fares, transport fuels
c ideas » _ ideas, 2 ideas, 6 ideas
3 ideas » _ ideas, 2 ideas
guias e » guias de
e mass » _ mass, a mass, 1 mass
file 1 » file _, file 2

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: (( luis ((c ideas) OR (3 ideas)) transport _ acao ) OR ( guias e mass transport file 1 ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( luis ((c ideas) OR (3 ideas)) transport _ acao ) or ( guias e mass transport file 1 ))~".
• Adding a wildcard symbol may retrieve word variants: (( luis ((c ideas) OR (3 ideas)) transport _ acao ) or ( guias e mass transport file 1 ))*.