Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does developpement » de developpement, des developpements, does development
developpement en » developpement et, developpement des, developpement de
communication 2 » communication _, communication a, communication 3
des variation » does variation, de variation, der variation
variation 3 » variation _, variation 6, variation 5
der opec » der oper, des opec, der opfer
2 does » 4 does
3 der » _ der, 2 der
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation 3 der opec communication 2 does developpement en afrique.*.