Perhaps you should try some spelling variations:
transport prices » transport price, transport services, transport policies
transfer risks » transfer risk
data transfer » cash transfer, heat transfer
gas transport » mass transport, bus transport, car transport
guias de » guia de, guide de, aguas de
prices a » prices _
risks 3 » risks _, risks 4, risks a
de gas » de gaos, die gas, de gaz

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 data transfer risks 3 ) OR ( guias de gas transport prices a ))~.
• Adding a wildcard symbol may retrieve word variants: (( guias 3 data transfer risks 3 ) or ( guias de gas transport prices a ))*.