Perhaps you should try some spelling variations:
personal communication » interpersonal communication
leur developpement » le developpement, deux developpements, de developpement
its variations » cost variations, rate variations, _ variations
variations das » variations des, variation des, variations a
typologie its » typologie des, typologie et, typologie cices
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 variations das dem personal communication a leur developpement des afrique.*.