Perhaps you should try some spelling variations:
transfer schemes » transfer scheme, transfer systems
transformed 2.1 » transformed 1, transformer 2.5.1, transformed _
der transfer » der transfers, den transfer, peer transfer
schemes fair » schemes fare, schemes after, schemes prior
2.1 macao » 2.1 macro, 2.1 lacan, 2.1 mao
en a » en la, e a, et a

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 _ der transfer schemes fair ) OR ( agua ((en a) OR (et al)) transformed 2.1 macao ))~.
• Adding a wildcard symbol may retrieve word variants: (( agua _ der transfer schemes fair ) or ( agua ((en a) or (et al)) transformed 2.1 macao ))*.