Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does developpement » de developpement, des developpements, does development
communication 4 » communication _, communication a, communication 3
developpement l » developpement il, developpement la, developpement de
variation 6 » variation _, variations _, variation des
l afrique » en afrique
dr opec » der opec, der oper, des opec
4 does » 2 does
6 dr » 6 der, 16 dr, _ dr

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation 6 dr opec communication 4 does developpement l afrique.*.