Perhaps you should try some spelling variations:
oral communication » personal communication
de developpement » sme development
developpement l » developpement il, developpement la, developpement de
des variation » does variation, de variation, der variation
l afrique » en afrique
dem der » dem ddr
de ddr » der ddr, die ddr, dem ddr
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 ((de ddr) OR (dem der)) oral communication _ de developpement l afrique.~.
• Adding a wildcard symbol may retrieve word variants: typologie des variation ((de ddr) or (dem der)) oral communication _ de developpement l afrique.*.