Perhaps you should try some spelling variations:
oral communication » personal communication
die developpement » de developpement, le developpement, du developpement
developpement l » developpement il, developpement la, developpement de
des variation » does variation, de variation, der variation
variation de » variation des, variation der, variation due
l afrique » en afrique
de ddr » der ddr, die ddr, dem ddr

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 OR typology) des variation de ddr oral communication _ die developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: (typologie OR typology) des variation de ddr oral communication _ die developpement l afrique.*.