Perhaps you should try some spelling variations:
oral communication » personal communication
developpements la » developpement la, developpements de, developpement de
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie des variation des dr oral communication ((a des) OR (a das)) developpements la afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation des dr oral communication ((a des) OR (a das)) developpements la afrique.*.