Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
oral communications » oral communication, rural communications, moral communication
development manuel » developpement manuel, development model, development master
trade development » software development
typologies des » typologie des, typologie der, typologien der
des variation » does variation, de variation, der variation
variation des » variation _, variation 6, variation series
costs trade » costly trade
dem oral » dem gral, dem ort
des dem » das dem, des der, des des

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

• Adding a wildcard symbol may retrieve word variants: typologies des variation des dem oral communications costs trade development manuel afrique.*.