Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
apologien die » apologien der, apologia de, apologie des
die variation » de variation, does variation, der variation
variation aid » variation im, variation und, variation a
aid dx » aid do
dx de » d de, ix de, x de
a des » a der
a das » 1 das, 2 das, 3 das

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: "apologien die variation aid dx de communication ((a des) OR (a das)) developpement de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: apologien die variation aid dx de communication ((a des) OR (a das)) developpement de l'afrique.*.