Perhaps you should try some spelling variations:
transfer schemes » transfer scheme, transfer systems
transformed de » transformed _, transformed 1, transformed a
head transfer » heat transfer, heart transfer, load transfer
schemes prior » schemes pro, schemes fair
a transformed » _ transformed, _ transformer, a transforming
agua et » agua e
de cao » de caso, de cabo, de capo
et a » et al, et la, e 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 _ head transfer schemes prior ) OR ( agua et a transformed de cao ))~.
• Adding a wildcard symbol may retrieve word variants: (( agua _ head transfer schemes prior ) or ( agua et a transformed de cao ))*.