Perhaps you should try some spelling variations:
oral communication » personal communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation 6 » variation _, variations _, variation des
6 ddr » 6 der, _ ddr
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation 6 ddr oral communication a de developpement en afrique.*.