Perhaps you should try some spelling variations:
developpement durable » developpement de
device communication » services communication, voice communication, mobile communication
de developpement » sme development
des variation » does variation, de variation, der variation
des device » vs device, less devices, types device
a de » a die, a der, a des
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation _ des device communication a de developpement durable afrique.*.