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
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
2 personal » 1 personal, 4 personal
de afrique » de l'afrique, en afrique, l afrique
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: typology de variation _ 2 personal communication a des developpement de afrique.*.