Perhaps you should try some spelling variations:
information center » information centers, information centre, information content
base communication » based communication, face communication, aware communication
developing areas » developing asia, developing east, developing a
communication 2 » communication _, communication a, communication 3
technologies 1 » technologies _, technologies 4, technologies 2
20 developing » 2 developing, 10 developing, 24 developing
areas afrique » areas africa
center 3.2 » center 3.1, center 13.5, century 3.2
3.2 base » 3.2 case, 3.2 basic, 3.2 phase
2 20 » 20 20, _ 20, 2 2

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 3.2 base communication 2 20 developing areas afrique.*.