Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
ict information » ct information, iot information, ist information
technology ict » technology 1
information 2 » information 3
de afrique » de l'afrique, en afrique, l afrique
das voice » das choice, a voice
costs au » costs a, costs amy, costs _
2 das » 1 das

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

• Adding a wildcard symbol may retrieve word variants: technology ict information 2 das voice communication costs au developpement de afrique.*.