Perhaps you should try some spelling variations:
developpement durable » developpement de
moral communication » oral communication, global communication, verbal communication
der variation » de variation, does variation, die variation
variation der » variation des, variation bei, variation _
typology der » typologie der, typologien der, typologie des
der der » oder der, der de, der den

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

• Adding a wildcard symbol may retrieve word variants: typology der variation der der moral communication media _ developpement durable l'afrique.*.