Perhaps you should try some spelling variations:
developpement economiques » developpement economique (Expand Search)
de developpement » _ development (Expand Search)
organisation de » organisation des (Expand Search), organisation du (Expand Search), reorganisation de (Expand Search)
cooperation des » cooperation de (Expand Search), cooperacion de (Expand Search), cooperacion del (Expand Search)
de cooperation » de cooperacion (Expand Search), _ cooperation (Expand Search), de cooperativa (Expand Search)