Perhaps you should try some spelling variations:
personal communication » interpersonal communication
leur developpement » le developpement, deux developpements, de developpement
typologie its » typologie des, typologie et, typologie cices
its variation » its variations, does variation, les variations
variation das » variation des, variation data, variations des
dem personal » der personal, de personal, des personal
des afrique » en afrique, de l'afrique
das dem » das der, das den, des 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 dem personal communication a leur developpement des afrique.*.