Perhaps you should try some spelling variations:
oral communication » personal communication
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
variation bei » variation des, variation der, variation _
apologien de » apologien der, apologia de, apologie des
de variation » der variation, die variation, does variation
does oral » does formal, does oil
bei does » being does, behn does, bei der
a du » a d, a de, a u

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

• Adding a wildcard symbol may retrieve word variants: apologien de variation bei does oral communication a du developpement en afrique.*.