Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does developpement » de developpement, des developpements, does development
developpement l » developpement il, developpement la, developpement de
variation 6 » variation _, variations _, variation des
l afrique » en afrique
dem opec » der opec, des opec, die opec
a does » 2 does, 4 does, 1 does
6 dem » 6 der, _ dem, 6 de

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

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