Perhaps you should try some spelling variations:
transfer systems » transport systems, transit systems
1 transformed » _ transformed, a transformed, vi transformed
transformed a » transformed _, transformed 1, transformer 1
den transfer » gene transfer, heat transfer, data transfer
systems data » systems der
aguas d » aguas de, aguas do, aguas del
a acao » a adocao

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 _ den transfer systems data ) OR ( aguas d 1 transformed a acao ))~.
• Adding a wildcard symbol may retrieve word variants: (( agua _ den transfer systems data ) or ( aguas d 1 transformed a acao ))*.