Perhaps you should try some spelling variations:
oral communication » personal communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
der variation » de variation, does variation, die variation
variation bei » variation des, variation der, variation _
2 oral » _ oral, 4 oral
bei 2 » bei _, bei a
a de » a die, a der, a des

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (typologie OR typologies) der variation bei 2 oral communication a de developpement en afrique.~.
• Adding a wildcard symbol may retrieve word variants: (typologie or typologies) der variation bei 2 oral communication a de developpement en afrique.*.