Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
de developpement » sme development
use interaction » user interaction, une interaction, use integration
technology use » technology 1, technology 2.2, technology 3
des afrique » en afrique, de l'afrique
space de » espace de, space die, space dead
costs de » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology use interaction _ space de communication costs de developpement des afrique.*.