Perhaps you should try some spelling variations:
oral communication » personal communication
does developpement » de developpement, des developpements, does development
developpement en » developpement et, developpement des, developpement de
variation oder » variation der, variation over, variation des
typologie et » typologie des, typologie der, typologie von
et variation » der variation, bei variation, 2 variation
oder den » oder der, wider den, uber den
den oral » den ort, new oral
a does » 2 does, 4 does, 1 does

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

• Adding a wildcard symbol may retrieve word variants: typologie et variation oder den oral communication a does developpement en afrique.*.