Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement et » developpement des, developpement de, development east
die variations » die variation, die variationen, like variations
typologie die » typologie des, typologie der, theologie die
variations 4 » variations _, variation 4, variations 1
et afrique » en afrique, l afrique
does de » does debt
4 does » 2 does
7.1 el » 1.1 el, 2.1 el, 4.1 el
3.1 el » 1.1 el

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie die variations 4 does de communication ((7.1 el) OR (3.1 el)) developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie die variations 4 does de communication ((7.1 el) OR (3.1 el)) developpement et afrique.*.