Perhaps you should try some spelling variations:
oral communication » personal communication
la developpement » le developpement, de developpement, et developpement
developpement en » developpement et, developpement des, developpement de
typologien does » typologie des, typologien der, typologie der
does variation » de variation, der variation, die variation
variation der » variation des, variation bei, variation _

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

• Adding a wildcard symbol may retrieve word variants: typologien does variation der ddr oral communication a la developpement en afrique.*.