Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
des developpements » deux developpements, de developpement, et developpements
developpements la » developpement la, developpements de, developpement de
communication 4 » communication _, communication a, communication 3
variation des » variation _, variation 6, variation series
la afrique » l afrique, la fabrique, en afrique
dr opec » der opec, der oper, des opec
4 des » 4 der, 4 das, a des

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation des dr opec communication 4 des developpements la afrique.*.