Perhaps you should try some spelling variations:
information century » information centers, information centre, information center
data communication » data communications
technologies 2 » technologies _, technologies 4
3.3 developing » 4 developing, 2 developing, 1 developing
century 3.3 » century 3.1, century 2.3, century 3.2
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
3.3 data » 2.3 data

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information century 3.3 data communication costs 3.3 developing _ africa.*.