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

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

• Performing a fuzzy search may retrieve terms with similar spellings: typologie der variation 6 dem device communication ((a des) OR (a das)) developpement des afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie der variation 6 dem device communication ((a des) OR (a das)) developpement des afrique.*".