Perhaps you should try some spelling variations:
cell communication » cell communications, oral communication, verbal communication
developpement en » developpement et, developpement des, developpement de
typologien die » typologien der, typologie des, typologie der
die variation » de variation, does variation, der variation
variation der » variation des, variation bei, variation _
does cell » es cell

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: typologien die variation der does cell communication ((_ du) OR (a d)) developpement en afrique.~.
• Adding a wildcard symbol may retrieve word variants: typologien die variation der does cell communication ((_ du) or (a d)) developpement en afrique.*.