Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications case » communication case, communications can, communications code
do developpement » de developpement, du developpement, le developpement
developpement en » developpement et, developpement des, developpement de
variation oder » variation der, variation over, variation des
ideologie die » ideologie de, ideologie der, ideologie des
die variation » de variation, does variation, der variation
der mobile » der mobilen, der mobil, does mobile
oder der » oder die
case do » case d, case d1, case d2

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

• Adding a wildcard symbol may retrieve word variants: ideologie die variation oder der mobile communications case do developpement en afrique.*.