Perhaps you should try some spelling variations:
transport code » transport mode, transport modes, transport model
mass transfer » cash transfer, basin transfer, mass transport
transfer a » transfer _, transfer 3, transfer 4
case bus » case b, case big
bias der » bias des, bias over, das der
der mass » der massen, der maske, over mass
a a » a la

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: (( areas case bus transport code _ ) OR ( bias der mass transfer a a ))~.
• Adding a wildcard symbol may retrieve word variants: (( areas case bus transport code _ ) or ( bias der mass transfer a a ))*.