Perhaps you should try some spelling variations:
oral communication » personal communication
variation series » education series, action series, edition series
does development » dams development, ides development, smes development
communication 4 » 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 _
1 afrique » l afrique, en afrique, 1 enrique
dr oral » dr osrar
4 does » 2 does

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 4 does development 1 afrique.*.