Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
d developpement » de developpement, du developpement, le developpement
developpement l » developpement il, developpement la, developpement de
des variation » does variation, de variation, der variation
variation des » variation _, variation 6, variation series
l afrique » en afrique
des dix » des dax, des diw, des dieux
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation des dix voice communication a d developpement l afrique.*.