Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
der variation » de variation, does variation, die variation
typology der » typologie der, typologien der, typologie des
de afrique » de l'afrique, en afrique, l afrique
3 der » 2 der
3 de » 3 die, 3 des, _ de

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: "typology der variation _ der de communication ((3 de) OR (3 der)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology der variation _ der de communication ((3 de) OR (3 der)) developpement de afrique.*.