Perhaps you should try some spelling variations:
oral communication » personal communication
developpement de » developpement des, developpement durable
typologien der » typologie der, typologie des, apologien der
der variation » de variation, does variation, die variation
variation bei » variation des, variation der, variation _
de afrique » de l'afrique, en afrique, l afrique
new oral » new moral, knew moral, new rural
bei new » being new
a lens » _ lens
a le » a les, a la, a l

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

• If you are trying to use Boolean operators, they must be ALL CAPS: typologien der variation bei new oral communication ((a le) OR (a lens)) developpement de afrique.~.
• Adding a wildcard symbol may retrieve word variants: typologien der variation bei new oral communication ((a le) or (a lens)) developpement de afrique.*.