Perhaps you should try some spelling variations:
oral communication » personal communication
development lid » development led, development li, development lie
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation des » variation _, variation 6, variation series
lid afrique » l 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 der variation des water oral communication _ gas development lid afrique.*.