Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
der developpement » de developpement, des developpements, leur developpement
developpement en » developpement et, developpement des, developpement de
communication 3 » communication _, communication a
variation des » variation _, variation 6, variation series
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
3 der » _ der, 2 der
etats » etat

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation des etats voice communication 3 der developpement en afrique.*.