Perhaps you should try some spelling variations:
china's transport » africa's transport, india's transport
transfer costs » transport costs, transfer amounts
transport data » transport demand
cost transfer » cast transfer, court transfer, cash transfer
debate cost » debate post, debate across, debate about
2.1 debate » 2.1 debatten, 11.1 debate, 2 debate
data cacao » data catalog
costs cao » costs case, costs cash, costs chap

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: (( 2.1 debate cost transfer costs cao ) OR ( luis _ china's transport data cacao ))~.
• Adding a wildcard symbol may retrieve word variants: (( 2.1 debate cost transfer costs cao ) or ( luis _ china's transport data cacao ))*.