Perhaps you should try some spelling variations:
developpement et » developpement des, developpement de, development east
variation 6 » variation _, variations _, variation des
et afrique » en afrique, l afrique
der human » d.c human
6 der » _ der, 2 der, 3 der
a du » a d, a u, _ du
a de » a die, a der, a des

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

• If you are trying to use Boolean operators, they must be ALL CAPS: typology _ variation 6 der human communication ((a du) OR (a de)) developpement et afrique.~.
• Adding a wildcard symbol may retrieve word variants: typology _ variation 6 der human communication ((a du) or (a de)) developpement et afrique.*.