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
typologie its » typologie des, typologie et, typologie cices
its variation » its variations, does variation, les variations
variation das » variation des, variation data, variations des
den personal » der personal, de personal, des personal
das den » das denn, das der, das dem

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

• Adding a wildcard symbol may retrieve word variants: typologie its variation das den personal communication a leur developpement en afrique.*.