Perhaps you should try some spelling variations:
oral communication » personal communication
developpement en » developpement et, developpement des, developpement de
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
variation bei » variation des, variation der, variation _
den oral » den ort, new oral
bei den » bei der
3 du » 3 due, 3 d, 3 de
3 zu » 3 zur, 3 zum, 2 zu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie does variation bei den oral communication ((3 du) OR (3 zu)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie does variation bei den oral communication ((3 du) OR (3 zu)) developpement en afrique.*.