Perhaps you should try some spelling variations:
rural transport » road transport, rail transport
transport data » transport demand
gas transfer » cash transfer, mass transfer, a transfer
transfer 4 » transfer _, transfer 3, transfer a
bias der » bias des, bias over, das der
areas 4 » areas _, areas a, areas 1
4 rural » a rural, 2 rural
der gas » der ga, der gap, der gaste
4 do » _ do, 1 do, i do

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( areas 4 rural transport data _ ) or ( bias der gas transfer 4 do ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( areas 4 rural transport data _ ) OR ( bias der gas transfer 4 do ))*.