Perhaps you should try some spelling variations:
reactive communication » proactive communication, active communication, seductive communication
information centers » information contents, information officers
communication 2.4 » communication 3.3, communication 4, communication _
technologies key » technologies any, technologies know, technologies _
key information » energy information
24 developing » 4 developing, 2 developing, 14 developing
2.3 reactive » 10.3 reactive, 2.5.1 reactive, 6.3.2 reactive
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
2.4 24 » 2.4 2.4, 2.4 25

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

• Adding a wildcard symbol may retrieve word variants: technologies key information centers 2.3 reactive communication 2.4 24 developing e afrique.*.