Perhaps you should try some spelling variations:
oral communication » personal communication
developpement l » developpement il, developpement la, developpement de
typologie die » typologie des, typologie der, theologie die
die variation » de variation, does variation, der variation
variation 6 » variation _, variations _, variation des
l afrique » en afrique
4 oral » _ oral, 2 oral
a des » a der, a das
a de » a die, a der, _ de

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 die variation 6 4 oral communication ((a de) OR (a des)) developpement l afrique.~.
• Adding a wildcard symbol may retrieve word variants: typologie die variation 6 4 oral communication ((a de) or (a des)) developpement l afrique.*.