Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
leur developpement » le developpement, deux developpements, de developpement
developpement en » developpement et, developpement des, developpement de
theologie der » ideologie der, typologie der, theorie der
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
e voice » _ voice, a voice, 5 voice
des e » des _, des 3

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

• Adding a wildcard symbol may retrieve word variants: theologie der variation des e voice communication a leur developpement en afrique.*.