Perhaps you should try some spelling variations:
informal communication » internal communication, information communication, internal communications
developpement en » developpement et, developpement des, developpement de
variation using » variations during, variation und, variation among
apologien der » typologien der, apologie des, ideologien der
der variation » de variation, does variation, die variation
die informal » die formal, do informal, i informal
using die » using dit, using due, using drive

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

• Adding a wildcard symbol may retrieve word variants: apologien der variation using die informal communication media _ developpement en afrique.*.