Perhaps you should try some spelling variations:
transport safety » transport strategy
den transport » de transport, sea transport, ion transport
transfer a » transfer _, transfer 3, transfer der
transfer 4 » transfer _, transfer 3, transfer der
guias des » guias de, guia de, bias des
aguas do » aguas de, aguas del
safety a » safety _, safety 1, safety 5
do den » co den

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 den transport safety a ) OR ( guias des boues ((transfer a) OR (transfer 4)) a ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas do den transport safety a ) or ( guias des boues ((transfer a) or (transfer 4)) a ))*.