Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
final voice » final advice, final device, final voyage
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation _ final voice communication a des developpement en afrique.*.