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
de variation » der variation, die variation, does variation
variation de » variation des, variation der, variation due
ddr personal » der personal, das personal, de personal
typology de » typology _, typology 6, typology a
de ddr » der ddr, die ddr, dem ddr

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

• Adding a wildcard symbol may retrieve word variants: typology de variation de ddr personal communication _ leur developpement en afrique.*.