Perhaps you should try some spelling variations:
information center » information centers, information centre, information content
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
2d developing » 2 developing, 20 developing, 24 developing
areas afrique » areas africa
center 2.3 » center 2.1, center 2.0, center 2.5
2.3 de » 2.3 die, 2.3 der, 4.3 de
4.3 2d » 2.3 2d, 3.3 2d, 4.3 2c

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information center 2.3 de communication 4.3 2d developing areas afrique.*.