Perhaps you should try some spelling variations:
voice communications » mobile communications, guinea communications, online communications
communications costs » communication costs, communications _
developpement en » developpement et, developpement des, developpement de
a developpement » au developpement, de developpement, le developpement
technologies 1 » technologies _, technologies 4, technologies 2
1 interaction » 10 interaction, 17 interaction, 19 interaction
interaction a » interaction _, interaction 1, interaction 4
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 interaction a data voice communications costs a developpement en afrique.*.