Perhaps you should try some spelling variations:
transfer schemes » transfer scheme, transfer systems
transformer 1 » transformer _, transformed _
schemes pt » scheme pt, schemes part, schemes pro
aguas del » aguas de, aguas do
de boues » des boues, de bonnes, les boues
1 macao » _ macao, 1 macro, 2.1 macao
de bus » de busca

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: (( vagues ((de bus) OR (de boues)) transfer schemes pt ) OR ( aguas del _ transformer 1 macao ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( vagues ((de bus) OR (de boues)) transfer schemes pt ) or ( aguas del _ transformer 1 macao ))~".
• Adding a wildcard symbol may retrieve word variants: (( vagues ((de bus) OR (de boues)) transfer schemes pt ) or ( aguas del _ transformer 1 macao ))*.