Perhaps you should try some spelling variations:
5.4 communication » de communication, data communication
developpement de » developpement des, developpement durable
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation 4 » variations 4, variation _, variation 6
de afrique » de l'afrique, en afrique, l afrique
does 5.4 » does 4.8
4 does » 2 does
1.3 el » 2.3 el
3.3 el » 2.3 el, 3.3 eu

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 der variation 4 does 5.4 communication ((1.3 el) OR (3.3 el)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation 4 does 5.4 communication ((1.3 el) OR (3.3 el)) developpement de afrique.*.