Perhaps you should try some spelling variations:
developpement durable » developpement de
separation using » operation using, separation among, separation und
du developpement » de developpement, le developpement, et developpement
ree separation » rate separation, grade separation, order separation
typologie ree » typologie des, typologie der, typologie et
using cecs » using pecs, using cas, using cdc
cecs data » cdas data, cdis data, des data

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

• Adding a wildcard symbol may retrieve word variants: typologie ree separation using cecs data communications _ du developpement durable afrique.*.