Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
de developpement » sme development
typologien de » typologien der, typologie des, typologie der
variation des » variation _, variation 6, variation series
de variation » der variation, die variation, does variation
des afrique » en afrique, de l'afrique
des deas » des des, des degats, des delays
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: typologien de variation des deas voice communication a de developpement des afrique.*.