Perhaps you should try some spelling variations:
transfer schemes » transfer scheme, transfer systems
schemes prior » schemes pro, schemes fair
transformer 1 » transformer _, transformed _
der transfer » der transfers, den transfer, peer transfer
agua 2 » agua e, agua _, agua y
2 der » _ der
e a » et a
acao » cacao, macao, cao

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: (( agua 2 der transfer schemes prior ) OR ( agua ((et al) OR (e a)) transformer 1 acao ))~.
• Adding a wildcard symbol may retrieve word variants: (( agua 2 der transfer schemes prior ) or ( agua ((et al) or (e a)) transformer 1 acao ))*.