Perhaps you should try some spelling variations:
oral communication » personal communication
die developpement » de developpement, le developpement, du developpement
developpement en » developpement et, developpement des, developpement de
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
does oral » does formal, does oil
media die » medien die, media age

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

• Adding a wildcard symbol may retrieve word variants: typology des variation _ does oral communication media die developpement en afrique.*.