Perhaps you should try some spelling variations:
personal communication » interpersonal communication
des developpements » deux developpements, de developpement, et developpements
developpements en » developpement en, developpement et, developpements de
des variation » does variation, de variation, der variation
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 _ a personal communication a des developpements en afrique.*.