Perhaps you should try some spelling variations:
formalen communication » informal communication, complex communication, force communication
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
dits formalen » des formalen, die formale, das formale
using dits » using dit, using phits, using data

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 dits formalen communication media _ developpement en afrique.*.