Perhaps you should try some spelling variations:
oral communication » personal communication
variation series » education series, action series, edition series
development east » development southeast, development 1
de development » e development, ce development, de developpement
typologien de » typologien der, typologie des, typologie der
de variation » der variation, die variation, does variation
east afrique » east africa, east african, en afrique
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: typologien de variation series _ oral communication a de development east afrique.*.