Perhaps you should try some spelling variations:
developpement durable » developpement de
drei communication » de communication, direct communication, data communication
et developpement » de developpement, le developpement, test development
typologies 6.4 » typologies 4.4, typologies 6.3, typologies 2.3
6.4 variation » 3.3 variation, 6.3.5 variation, _ variation
variation es » variation des, variation test, variations des
den drei » der drei, die drei
a et » a set, a net, a bet

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

• Adding a wildcard symbol may retrieve word variants: typologies 6.4 variation es den drei communication a et developpement durable afrique.*.