Perhaps you should try some spelling variations:
oral communication » personal communication
developpement de » developpement des, developpement durable
ideologie der » ideologie und, typologie der
der variation » de variation, does variation, die variation
variation bei » variation des, variation der, variation _
de afrique » de l'afrique, en afrique, l afrique
der oral » der moral, der ort, der orte

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

• Adding a wildcard symbol may retrieve word variants: ideologie der variation bei der oral communication media _ developpement de afrique.*.