Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
information centers » information contents, information officers
de communications » de communication, do communications, mce communications
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
14.3 developing » 1.3 developing, 10.3 developing, 14.1 developing
centers how » center how, centers hold, century how
costs 14.3 » costs 4.3, costs 12.3, costs 15.3
how de » how doe, how do, how ae

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information centers how de communications costs 14.3 developing _ africa.*.