Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
developpement de » developpement des, developpement durable
variation des » variation _, variation 6, variation series
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
real voice » real price
de afrique » de l'afrique, en afrique, l afrique
des real » des realen, des rent
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.

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