Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
der separation » order separation, air separation, ree separation
separation und » separation unit, separation index, separation using
ideologie der » ideologie und, typologie der
de afrique » de l'afrique, en afrique, l afrique
le risk » e risk, de risk, life risk
und le » und leo, und leib, und lege

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

• Performing a fuzzy search may retrieve terms with similar spellings: ideologie der separation und le risk communication ((a l) OR (a la)) developpement de afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ideologie der separation und le risk communication ((a l) OR (a la)) developpement de afrique.*".