Perhaps you should try some spelling variations:
human transport » urban transport, rural transport, ocean transport
transport fuel » transport fares
transfer 3 » transfer 4, transfer a, transfer 3.2
vague de » vagues de, langue de, vue de
de human » e human, one human, use human
guide a » guide _
fuel a » fuel _, fuel tax, fuel gas
a cas » a case, a cash, a casa

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: (( vague de human transport fuel a ) OR ( guide a cas ((transfer 3) OR (transfer _)) do ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( vague de human transport fuel a ) or ( guide a cas ((transfer 3) OR (transfer _)) do ))~".
• Adding a wildcard symbol may retrieve word variants: (( vague de human transport fuel a ) or ( guide a cas ((transfer 3) OR (transfer _)) do ))*.