Perhaps you should try some spelling variations:
transform tvdft » transform test
transform fft » transform cote, transform test, transform _
das transfer » gas transfer, cash transfer, data transfer
areas coal » areas can, areas co
transfer 4 » transfer _, transfer 3, transfer a
guias 2 » guias de
2 das » 1 das
4 ao » 4 aoi, 4 a, 4 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 coal ideal ((transform fft) OR (transform tvdft)) _ ) OR ( guias 2 das transfer 4 ao ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas coal ideal ((transform fft) OR (transform tvdft)) _ ) or ( guias 2 das transfer 4 ao ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas coal ideal ((transform fft) OR (transform tvdft)) _ ) or ( guias 2 das transfer 4 ao ))*.