Perhaps you should try some spelling variations:
communication model » communication media
information gaps » information gap
development case » development china
why development » way development, key development, fly development
model why » model who, model what, model when
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 _ information gaps do risk communication model why development case afrique.*.