Perhaps you should try some spelling variations:
oral communication » personal communication
developpement la » developpement de, developpement et, developpement du
des variation » does variation, de variation, der variation
variation des » variation _, variation 6, variation series
la afrique » l afrique, la fabrique, en afrique
dr oral » dr osrar
a des » a der
a das » 1 das, 2 das, 3 das
typologie » typologies, typology

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 des variation des dr oral communication ((a des) OR (a das)) developpement la afrique.~.
• Adding a wildcard symbol may retrieve word variants: typologie des variation des dr oral communication ((a des) or (a das)) developpement la afrique.*.