Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication 4.3 » communication 3.3, communication 4.1, communication 3
de communication » mobile communication, online communication
developing areas » developing asia, developing east, developing a
technologies 1 » technologies _, technologies 4, technologies 2
24 developing » 4 developing, 2 developing, 14 developing
areas afrique » areas africa
centers 2.3 » center 2.3, centers 2.2, centers 2.8
2.3 de » 2.3 die, 2.3 der, 4.3 de
4.3 24 » 4.3 2c, 4.3 2d

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information centers 2.3 de communication 4.3 24 developing areas afrique.*.