Perhaps you should try some spelling variations:
clean development » human development, urban development
transformation a » transformation _
development main » development making, development moving, development mode
technologie die » technologie de, technologie im, technologie der
main afrique » en afrique
costs clean » costs clear
a die » 2 die, 3 die, _ die

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

• Adding a wildcard symbol may retrieve word variants: technologie die transformation a die _ communication costs clean development main afrique.*.