Perhaps you should try some spelling variations:
oral communication » personal communication
dams development » dam development, gas development, ads development
development led » development lid, development leads, development land
variation less » variation des, variation test, variation bei
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
led afrique » en afrique, l afrique
less water » loss water, leste water, mass water

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation less water oral communication _ dams development led afrique.*.