Perhaps you should try some spelling variations:
separation using » operation using, separation among, separation und
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
der separation » order separation, air separation, ree separation
ideologie der » ideologie und, typologie der
less risk » less risky, lens risk, loss risk
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: ideologie der separation using less risk communication a de developpement en afrique.*.