Perhaps you should try some spelling variations:
personen communication » personal communication, personal communications, prone 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 des » variation _, variation 6, variation series
der personen » der personalen, per person, und personen
des der » des dr, des ddr, 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 des der personen communication a leur developpement en afrique.*.