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

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

• Adding a wildcard symbol may retrieve word variants: typologies des variation _ der oral communication costs trade development l afrique.*.