Perhaps you should try some spelling variations:
personal communication » interpersonal communication
leur developpement » le developpement, deux developpements, de developpement
developpement en » developpement et, developpement des, developpement de
der variations » der variation, 1er variations, ier variations
typologie der » typologie des, ideologie der
dr personal » der personal, de personal, das personal

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

• Adding a wildcard symbol may retrieve word variants: typologie der variations _ dr personal communication a leur developpement en afrique.*.