Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does developpement » de developpement, des developpements, does development
typologien der » typologie der, typologie des, apologien der
der variation » de variation, does variation, die variation
des l'afrique » de l'afrique, de l'amerique
variation 3 » variation _, variation 6, variation 5
der opec » der oper, des opec, der opfer
a does » 2 does, 4 does, 1 does
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: typologien der variation 3 der opec communication a does developpement des l'afrique.*.