Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
variation series » education series, action series, edition series
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
series de » series d, series e, series new
de verbal » des verbal, die verbale, pre verbal
a de » a die, a der, a 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 de verbal communication a de developpement en afrique.*.