Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
does developpement » de developpement, des developpements, does development
developpement la » developpement de, developpement et, developpement du
la afrique » l afrique, la fabrique, en afrique
des dem » das dem, des des, des deux
des der » des dr, des ddr, des des
a does » 2 does, 4 does, 1 does

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typology _ variation ((des dem) OR (des der)) opec communication a does developpement la afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation ((des dem) OR (des der)) opec communication a does developpement la afrique.*.