Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
10 communications » 10 communication, 14 communications, 2 communications
clean development » human development, urban development
technology trade » technology trends, technology transfer, technology transfers
integration does » integration des, integration der, integration das
costs clean » costs clear
does does » does de

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration does does 10 communications costs clean development africa a.*.