Perhaps you should try some spelling variations:
oral communication » personal communication
variation series » education series, action series, edition series
dams development » dam development, gas development, ads development
development ds » development d, development does, development desd
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
series diw » series d, series new, series de
ds afrique » en afrique, l afrique, de l'afrique
diw oral » i oral, ii oral, iii oral

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation series diw oral communication _ dams development ds afrique.*.