Perhaps you should try some spelling variations:
trade developpement » trade developement, trade development, de developpement
oral communication » personal communication
developpement en » developpement et, developpement des, developpement de
typologies der » typologie der, typologien der, typologie des
der variation » de variation, does variation, die variation
variation 3 » variation _, variation 6, variation 5
costs trade » costly trade
der oral » der moral, der ort, der orte
3 der » _ der, 2 der

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

• Adding a wildcard symbol may retrieve word variants: typologies der variation 3 der oral communication costs trade developpement en afrique.*.