Perhaps you should try some spelling variations:
communication network » communication networks, communications network, communications networks
clean development » human development, urban development
information need » information needs, information needed, information speed
la communication » data communication, data communications
development case » development china
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
network clean » network cloud, network area, network club
need de » need le, need fide, need one

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

• Adding a wildcard symbol may retrieve word variants: technologies a information need de la communication network clean development case afrique.*.