Perhaps you should try some spelling variations:
oral communication » personal communication
das developpement » des developpements, de developpement, du developpement
variation series » education series, action series, edition series
developpement de » developpement des, developpement durable
communication 1 » communication _, communication a, communication 3
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
series dr » series d, series de, series _
dr oral » dr osrar

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation series dr oral communication 1 das developpement de l'afrique.*.