Perhaps you should try some spelling variations:
cell communications » cell communication, health communications, rural communications
typologien die » typologien der, typologie des, typologie der
die variation » de variation, does variation, der variation
variation bei » variation des, variation der, variation _
des afrique » en afrique, de l'afrique
es cell » es cells, does cell, test cell
bei es » bei ex
a set » _ set
a et » a net, a bet, a jet

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: "typologien die variation bei es cell communications ((a et) OR (a set)) developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologien die variation bei es cell communications ((a et) OR (a set)) developpement des afrique.*.