Perhaps you should try some spelling variations:
oral communication » personal communication
die developpement » de developpement, le developpement, du developpement
variation series » education series, action series, edition series
developpement en » developpement et, developpement des, developpement de
apologien die » apologien der, apologia de, apologie des
die variation » de variation, does variation, der variation
series 4 » series _, series 1, series 2
4 oral » _ oral, 2 oral

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

• Adding a wildcard symbol may retrieve word variants: apologien die variation series 4 oral communication _ die developpement en afrique.*.