Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
der developpements » des developpements, deux developpements, de developpement
developpements en » developpement en, developpement et, developpements de
communication 2 » communication _, communication a, communication 3
ideologie der » ideologie und, typologie der
der variation » de variation, does variation, die variation
der opec » der oper, des opec, der opfer

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

• Adding a wildcard symbol may retrieve word variants: ideologie der variation _ der opec communication 2 der developpements en afrique.*.