Perhaps you should try some spelling variations:
oral communication » personal communication
africa development » african development, american development, physical development
development en » developpement en, development menu, development eco
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
hier oral » einer oral
des hier » das hier, es hier, des trier

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation des hier oral communication _ africa development en afrique.*.