Perhaps you should try some spelling variations:
5.1 communications » 3.1 communications, 4.1 communication, 1.1 communication
information data » information d820, information database, information databases
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
technologies 2 » technologies _, technologies 4
data extent » data latent, data element, data content
extent 5.1 » extend 4.1, extent 3.3, extent 8.3

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information data extent 5.1 communications _ le developpement en afrique.*.