Perhaps you should try some spelling variations:
modern communications » modern communication, modern communicators, border communications
communications costs » communication costs, communications _
information centers » information contents, information officers
development 1.1 » development 2.1, development 2.3, development 2.2
technologies 2 » technologies _, technologies 4
3 development » 2 development
centers 13 » centers 10, centers 3, centers 3.3
1.1 africa » 1.1 african, 11 africa, 2.1 african
13 modern » 1.3 modern, 1 modern, 10 modern
costs 3 » 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: technologies 2 information centers 13 modern communications costs 3 development 1.1 africa.*.