Perhaps you should try some spelling variations:
information centers » information contents, information officers
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
60 developing » 10 developing, 20 developing, 90 developing
developing 1 » developing _, developing a, developing e
centers 2.5 » center 2.5, centers 2.2, centers 2.8
costs 60 » costs 20, costs 6.4, costs 168
2.5 de » 2.5 die, 2.5 der, 2.5 dve

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 2.5 de communication costs 60 developing 1 africa.*.