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
1.3 developing » 3.3 developing, 13 developing, 7.3 developing
developing a » developing _
centers how » center how, centers hold, century how
costs 1.3 » costs 12.3, costs 14.3, costs 15.3
a africa » 1 africa, can africa, em africa
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 1.3 developing a africa.*.