Perhaps you should try some spelling variations:
data communication » data communications
separation among » separation using, starvation among, cooperation among
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
des separation » ree separation, order separation, post separation
apologie des » l'apologie des, typologie des, apologien der
among trial » among typical, among formal, among social
trial data » real data
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: apologie des separation among trial data communication a de developpement en afrique.*.