Perhaps you should try some spelling variations:
oral communication » personal communication
development manuel » developpement manuel, development model, development master
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation der » variation des, variation bei, variation _
den oral » den ort, new oral
der den » oder den, der de, der der

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation der den oral communication _ career development manuel afrique.*.