Perhaps you should try some spelling variations:
free transport » green transport, sea transport, freight transport
transport co2 » transport cost, transport code, transport can
a transformed » _ transformed, _ transformer, a transforming
transformed a » transformed _, transformed 1, transformer 1
co2 across » cil across, ct across, costs across
aguas do » aguas de, aguas del
do free » der free, des free
agua et » agua e
a cao » a car, a cat, a ceo
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: (( aguas do free transport co2 across ) OR ( agua et a transformed a cao ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas do free transport co2 across ) or ( agua et a transformed a cao ))*.