Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
13 developing » 1.3 developing, 3 developing, 1 developing
developing ii » developing ai, developing ict, developing cil
centers 10 » centers _, center 1, center 12
ii africa » ii afrika, ii america, 1 africa
cost 13 » cost 12, cost 15, cost e3
10 de » 10 die, 10 der, 10 des

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 10 de communication cost 13 developing ii africa.*.