Perhaps you should try some spelling variations:
transformed rivers » transforming rivers, transforming river, transformed residents
world transformed » world transforming
river transport » air transport, water transport, private transport
language volta » language costa, language data, language contact
transport cost » transport costs
rivers across » lives across, ideas across, risks across
volta river » valta river
ideale und » ideal und
und world » fund world, undp world, 2nd world
cost code » host code, cost model, fast code

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: (( ideale und world transformed rivers across ) OR ( language volta river transport cost code ))~.
• Adding a wildcard symbol may retrieve word variants: (( ideale und world transformed rivers across ) or ( language volta river transport cost code ))*.