Perhaps you should try some spelling variations:
information centers » information contents, information officers
base communication » based communication, face communication, aware communication
communication 1 » communication _, communication a, communication 3
technologies 2 » technologies _, technologies 4
developing e » developing _, developing a, developing east
centers 2.3 » center 2.3, centers 2.2, centers 2.8
e afrique » en afrique, l afrique, de l'afrique
2.3 base » 2.3 case, 2.1 base, 2.2 base

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 2.3 base communication 1 _ developing e afrique.*.