Perhaps you should try some spelling variations:
information centres » information centre, information centrism, information centers
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
20 developing » 2 developing, 10 developing, 24 developing
developing 1 » developing _, developing a, developing e
centres 2.5 » centres 3.5, centres 2.5.4, centres 5.3
costs 20 » costs 60, costs 2.3, costs 2.1
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 centres 2.5 de communication costs 20 developing 1 africa.*.