Perhaps you should try some spelling variations:
oral communication » personal communication
developpement de » developpement des, developpement durable
variation being » variation bei, variation using, variation among
die variation » de variation, does variation, der variation
typology die » typology _, typology 4.1, typology 6
de afrique » de l'afrique, en afrique, l afrique
being es » being does, being _, being a
es oral » vs oral, des moral, new oral

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

• Adding a wildcard symbol may retrieve word variants: typology die variation being es oral communication media _ developpement de afrique.*.