Perhaps you should try some spelling variations:
power transformer » power transformers, pour transformer, power transforming
main transport » carbon transport, modern transport
transport air » transport a, transport data, transport _
transformer 3 » transformers 3, transformer 1, transformer _
guias pdr » guias de
pdr power » peer power, dc power, d power
air acao » air act
f main » 1 main, 2 main, 3 main
3 can » _ can

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( luis f main transport air acao ) or ( guias pdr power transformer 3 can ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( luis f main transport air acao ) OR ( guias pdr power transformer 3 can )).
• Adding a wildcard symbol may retrieve word variants: (( luis f main transport air acao ) or ( guias pdr power transformer 3 can ))*.