Perhaps you should try some spelling variations:
oral communication » personal communication
trade development » software development
typologies der » typologie der, typologien der, typologie des
der variation » de variation, does variation, die variation
development l » development li, development 1, development law
variation 6 » variation _, variations _, variation des
costs trade » costly trade
l afrique » en afrique
der oral » der moral, der ort, der orte
6 der » _ der, 2 der, 3 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 6 der oral communication costs trade development l afrique.*.