Perhaps you should try some spelling variations:
transformation und » transformation _, transformation a
waste transfer » waste transport, cash transfer, wire transfer
aguas do » aguas de, aguas del
do waste » bio waste, _ waste, e waste
guias 3 » guias de
fairs a » fairs _, fairs 3
fair a » fair ai, fair _, fair 4
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 do waste transfer ((fairs a) OR (fair a)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( guias 3 _ transformation und 3 ) or ( aguas do waste transfer ((fairs a) OR (fair a)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( guias 3 _ transformation und 3 ) or ( aguas do waste transfer ((fairs a) OR (fair a)) ))*.