Perhaps you should try some spelling variations:
information rates » information states, information ratio, information rules
5.4 communication » de communication, data communication
developpement de » developpement des, developpement durable
4 information » 2 information, 1 information
technology 4 » technology _, technology 1, technology 3
de afrique » de l'afrique, en afrique, l afrique
east 5.4 » ast 5.4, east 5.1, blast 5.4

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

• Adding a wildcard symbol may retrieve word variants: technology 4 information rates east 5.4 communication costs _ developpement de afrique.*.