Perhaps you should try some spelling variations:
use developpement » de developpement, le developpement, use development
developpement de » developpement des, developpement durable
technologies 4 » technologies _
informal about » informal out, informal labor, informal group
value mobile » value profile, value model, case mobile
about value » about values
4 informal » 4 informale, _ informal, 3 informal
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 informal about value mobile communication media use developpement de afrique.*.