Perhaps you should try some spelling variations:
communication network » communication networks, communications network, communications networks
oral communication » personal communication
hard information » card information, hand information, award information
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
technology hard » technology has, technology have, technology hydro
network du » network do, network dmz, network _
flows do » flows how, flows job, flows _
do oral » do rural, who oral

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

• Adding a wildcard symbol may retrieve word variants: technology hard information flows do oral communication network du developpement en afrique.*.