Perhaps you should try some spelling variations:
oral communication » personal communication
des developpements » deux developpements, de developpement, et developpements
developpements de » developpement de, developpement des, developpement du
variation using » variations during, variation und, variation among
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
using does » using deep, being does, using aes
de afrique » de l'afrique, en afrique, l afrique
does oral » does formal, does oil
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation using does oral communication a des developpements de afrique.*.