Perhaps you should try some spelling variations:
oral communication » personal communication
du developpement » de developpement, le developpement, et developpement
developpement du » developpement de, developpement des, developpement et
variation behn » variation bei, variation des, variation der
apologien de » apologien der, apologia de, apologie des
de variation » der variation, die variation, does variation
du afrique » en afrique, l afrique, de l'afrique
behn does » being does, ban does
does oral » does formal, does oil
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 behn does oral communication a du developpement du afrique.*.