Perhaps you should try some spelling variations:
oral communication » personal communication
variation series » education series, action series, edition series
communication 13 » communication 1.3, communication 3, communication 1
de developpement » sme development
developpement et » developpement des, developpement de, development east
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
series degats » series data
et afrique » en afrique, l afrique
13 de » 13 die, 13 der, 13 des

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 degats oral communication 13 de developpement et afrique.*.