Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
das developpement » des developpements, de developpement, du developpement
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
des afrique » en afrique, de l'afrique
6 dem » 6 der, 6 de, a dem
_ dem » _ der, _ den
a das » 1 das, 2 das, 3 das

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie der variation ((6 dem) OR (_ dem)) device communication a das developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation ((6 dem) OR (_ dem)) device communication a das developpement des afrique.*.