Perhaps you should try some spelling variations:
communication model » communication media
information gaps » information gap
open development » clean development, driven development, human development
development case » development china
technologies 2 » technologies _, technologies 4
model open » model option
gaps do » games do, gaps how, gaps vom
do risk » d risk, de risk, dam risk

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information gaps do risk communication model open development case afrique.*.