Perhaps you should try some spelling variations:
personal communication » interpersonal communication
des developpement » des developpements, de developpement, le developpement
developpement de » developpement des, developpement durable
variation uber » variationen uber, variation bei, variation der
des variation » does variation, de variation, der variation
des personal » des personals, der personal, das personal
uber des » uber den, uber das, uber drei
a des » a der, a das
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation uber des personal communication a des developpement de l'afrique.*.