Perhaps you should try some spelling variations:
transfer schemes » transfer scheme, transfer systems
a transformed » _ transformed, _ transformer, a transforming
transformed 1 » transformed _, transformer 1, transformed a
schemes fare » schemes fair, schemes part, schemes carol
agua el » agua e, aguas del
1 macao » _ macao, 1 macro, 2.1 macao
agua 2 » agua e, agua y
el a » e a, et a, en a
heat » head

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) OR (agua _)) heat transfer schemes fare ) OR ( agua el a transformed 1 macao ))~.
• Adding a wildcard symbol may retrieve word variants: (( ((agua 2) or (agua _)) heat transfer schemes fare ) or ( agua el a transformed 1 macao ))*.