Perhaps you should try some spelling variations:
communication across » communication cross, communicating across, communication about
grade developpement » trade developement, trade development, de developpement
oral communication » personal communication
typologien der » typologie der, typologie des, apologien der
der variation » de variation, does variation, die variation
des l'afrique » de l'afrique, de l'amerique
across grade » across gender
etc oral » etc moral, etc arab, etc iran

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

• Adding a wildcard symbol may retrieve word variants: typologien der variation _ etc oral communication across grade developpement des l'afrique.*.