Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
developpement en » developpement et, developpement des, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation 6 » variation _, variations _, variation des
deas device » real device, less devices
6 deas » 6 ideas, 6 dead
a der » _ der, 2 der, 1 der
3 der » _ der, 2 der

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 deas device communication ((a der) OR (3 der)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation 6 deas device communication ((a der) OR (3 der)) developpement en afrique.*.