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)
de cooperation » de cooperacion (Expand Search), _ cooperation (Expand Search), de cooperativa (Expand Search)
cooperation en » cooperacion en (Expand Search), cooperation des (Expand Search), cooperativos en (Expand Search)
en de » en le (Expand Search), en e (Expand Search), en ee (Expand Search)