Perhaps you should try some spelling variations:
cell communications » cell communication, health communications, rural communications
developpement de » developpement des, developpement durable
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
es cell » es cells, does cell, test cell
3 set » _ set, a set, 4 set
2 set » _ set, a set

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 _ es cell communications ((3 set) OR (2 set)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation _ es cell communications ((3 set) OR (2 set)) developpement de l'afrique.*.