Perhaps you should try some spelling variations:
5.4 communication » de communication, data communication
developpement du » developpement de, developpement des, developpement et
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation 4 » variations 4, variation _, variation 6
du afrique » en afrique, l afrique, de l'afrique
does 5.4 » does 4.8
4 does » 2 does
1.3 en » 1.3 ein, 1.3 el, 1.3 ed
1.3 ea » 1.3 el, 1.3 ca, 1.3 ed

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