Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement durable » developpement de
leur developpement » le developpement, deux developpements, de developpement
rates personal » states personal, names personal, roles personal
des variation » does variation, de variation, der variation
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 _ rates personal communication a leur developpement durable afrique.*.