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 over, das der, biais de
bias des » cas des, biais de, bias als
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) OR (bias des)) mass transfer a a ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas case bus transport code _ ) or ( ((bias der) OR (bias des)) mass transfer a a ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas case bus transport code _ ) or ( ((bias der) OR (bias des)) mass transfer a a ))*.