Perhaps you should try some spelling variations:
oral communication » personal communication
deux developpement » deux developpements, de developpement, du developpement
developpement de » developpement des, developpement durable
des variation » does variation, de variation, der variation
variation der » variation des, variation bei, variation _
de afrique » de l'afrique, en afrique, l afrique
does oral » does formal, does oil
typologie » typologies, typology

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

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