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 do » integration de, integration du, integration does
costs clean » costs clear
do notes » down notes, day notes, two notes
notes 10 » notes _, notes 2, notes 4

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

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