Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
de communication » mobile communication, online communication
developpement l » developpement il, developpement la, developpement de
informal group » informal groups, informal gold, informal out
group them » group theory
l afrique » en afrique
them de » thema der, thema des

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

• Adding a wildcard symbol may retrieve word variants: technologie _ informal group them de communication media leur developpement l afrique.*.