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

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation _ deas voice communication a der developpement et afrique.*.