Perhaps you should try some spelling variations:
oral communication » personal communication
der developpement » de developpement, des developpements, leur developpement
apologien does » apologie des, apologien der
does variation » de variation, der variation, die variation
des afrique » en afrique, de l'afrique
does oral » does formal, does oil
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: apologien does variation _ does oral communication a der developpement des afrique.*.