Perhaps you should try some spelling variations:
oral communication » personal communication
dams developpement » dams development, de developpement, du developpement
developpement et » developpement des, developpement de, development east
typologie les » typologie des, typologie der, typologie et
les variation » les variations, does variation, de variation
variation der » variation des, variation bei, variation _
et afrique » en afrique, l afrique
der water » der vater, under water, over water

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

• Adding a wildcard symbol may retrieve word variants: typologie les variation der water oral communication _ dams developpement et afrique.*.