Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
developpements en » developpement en, developpement et, developpements de
variation des » variation _, variation 6, variation series
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
dem device » tpm device
des dem » das dem, des der, des des
a set » _ set
a et » a net, a bet, a jet

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 de variation des dem device communication ((a et) OR (a set)) developpements en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation des dem device communication ((a et) OR (a set)) developpements en afrique.*.