Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
le developpement » de developpement, sme development
apologien does » apologie des, apologien der
does variation » de variation, der variation, die variation
des afrique » en afrique, de l'afrique
des opec » der opec, des opnv
a le » a les, a la, a l

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

• Adding a wildcard symbol may retrieve word variants: apologien does variation _ des opec communication a le developpement des afrique.*.