Perhaps you should try some spelling variations:
oral communication » personal communication
leur developpement » le developpement, deux developpements, de developpement
developpement il » developpement de, developpement et, developpement du
des variation » does variation, de variation, der variation
il afrique » l afrique, en afrique
a oral » _ oral, 2 oral, 4 oral
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation _ a oral communication a leur developpement il afrique.*.