Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement manuel » development manuel, developpement quel, developpement mondial
dams developpement » dams development, de developpement, du developpement
der personal » der personalen, der personen, der person
6 variation » 6 variations, _ variation, 2 variation
variation 6 » variation _, variations _, variation des
typology 6 » typology _, typology 4.1
6 der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: typology 6 variation 6 der personal communication _ dams developpement manuel afrique.*.