Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
l developpement » le developpement, de developpement, et developpement
separation unit » separation und, separation using, generation unit
der separation » order separation, air separation, ree separation
ideologie der » ideologie und, typologie der
de afrique » de l'afrique, en afrique, l afrique
unit test » unit tests, unit cost, fit test
test risk » pest risk, best risks, trust risk
a l » a la

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

• Adding a wildcard symbol may retrieve word variants: ideologie der separation unit test risk communication a l developpement de afrique.*.