Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
developpement l » developpement il, developpement la, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
die voice » cine voice, one voice
l afrique » en afrique
des die » es die, des diw, des dix
a du » a de, a u, _ du

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 des die voice communication ((a du) OR (a d)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation des die voice communication ((a du) OR (a d)) developpement l afrique.*.