Perhaps you should try some spelling variations:
information centers » information contents, information officers
face communication » voice communication, de communication, time communication
technologies des » technologien des, technologies de, technologies dans
communication 20 » communication 2.0, communication 2, communication 10
des information » des informations, does information, dis information
21 developing » 2.1 developing, 2 developing, 1 developing
developing a » developing _
centers 2.2 » centers 2.8, centers 12.4, century 2.2
a afrique » l afrique, en afrique
2.2 face » 12.2 face, 2.3 face, 3.2 face

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

• Adding a wildcard symbol may retrieve word variants: technologies des information centers 2.2 face communication 20 21 developing a afrique.*.