Perhaps you should try some spelling variations:
oral communication » personal communication
dams development » dam development, gas development, ads development
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
development li » development lid, development lie, development lin
variation der » variation des, variation bei, variation _
li afrique » l afrique, en 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 does variation der water oral communication _ dams development li afrique.*.