Perhaps you should try some spelling variations:
power transformers » power transformer, pour transformer, power transforming
transport em » transport en, transport et, transport amp
3.1 basic » 2.1 basic
guias de » guia de, guide de, aguas de
de power » de poder, me power, dwde power
3 basic » 2 basic

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( luis ((3 basic) or (3.1 basic)) transport em acao ) or ( guias de power transformers _ can ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( luis ((3 basic) OR (3.1 basic)) transport em acao ) OR ( guias de power transformers _ can )).
• Adding a wildcard symbol may retrieve word variants: (( luis ((3 basic) or (3.1 basic)) transport em acao ) or ( guias de power transformers _ can ))*.