Perhaps you should try some spelling variations:
oral communication » personal communication
dams development » dam development, gas development, ads development
die variationen » die variation, sowie variationen, de variation
variationen des » variationen der, variation des, variations des
development li » development lid, development lie, development lin
typologie die » typologie des, typologie der, theologie die
li afrique » l afrique, en afrique
des water » does water, des warner, less water

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

• Adding a wildcard symbol may retrieve word variants: typologie die variationen des water oral communication _ dams development li afrique.*.