Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
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 less » _ less, a lens, a lesson
a les » a lens, 2 les, 1 les

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: "apologien does variation _ des opec communication ((a les) OR (a less)) developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: apologien does variation _ des opec communication ((a les) OR (a less)) developpement des afrique.*.