Perhaps you should try some spelling variations:
voice communications » mobile communications, guinea communications, online communications
communications costs » communication costs, communications _
information needs » information networks
technologies can » technologies a, technologies co, technologies _
developpement en » developpement et, developpement des, developpement de
can information » von information, von informationen
4 developpement » de developpement, le developpement, et developpement
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies can information needs _ voice communications costs 4 developpement en afrique.*.