Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
variation bus » variation des, variation bei, variation due
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
bus costs » gas costs
costs de » costs _, costs 4, costs a
media du » media die, media das, media der

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation bus costs de communication media du developpement en afrique.*.