Perhaps you should try some spelling variations:
transformation und » transformation _, transformation a
transfer factors » transfer factor, transfer across, transfer functions
waste transfer » waste transport, cash transfer, wire transfer
aguas del » aguas de, aguas do
del waste » e waste, new waste
factors a » factors _, factors 4, factors 3
guias 3 » guias de
und 3 » und _, und 2

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: (( guias 3 _ transformation und 3 ) OR ( aguas del waste transfer factors a ))~.
• Adding a wildcard symbol may retrieve word variants: (( guias 3 _ transformation und 3 ) or ( aguas del waste transfer factors a ))*.