Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
leur developpement » le developpement, deux developpements, de developpement
developpement en » developpement et, developpement des, developpement de
des variation » does variation, de variation, der variation
variation 6 » variation _, variations _, variation des
debt device » debt service, debt services
6 debt » 3 debt, 4 debt
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 6 debt device communication a leur developpement en afrique.*.