Perhaps you should try some spelling variations:
mass transport » gas transport, mass transit, bus transport
transport code » transport mode, transport modes, transport model
sea transport » road transport, bus transport
mass transfer » cash transfer, basin transfer, asset transfer
case sea » case s0, case sub
bias due » bias die, bias der, bias des
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 sea transport code _ ) OR ( bias due ((mass transfer) OR (mass transport)) a a ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas case sea transport code _ ) or ( bias due ((mass transfer) OR (mass transport)) a a ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas case sea transport code _ ) or ( bias due ((mass transfer) OR (mass transport)) a a ))*.