Perhaps you should try some spelling variations:
communication network » communication networks, communications network, communications networks
mass communication » risk communication, _ communication, mobile communication
urban development » human development
information gaps » information gap, information flows, information needs
development en » development menu, development can, development _
network urban » network area
de mass » does mass, ice mass

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information gaps de mass communication network urban development en afrique.*.