Perhaps you should try some spelling variations:
communications networks » communication networks, telecommunications networks, telecommunications network
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
information 5.4 » information 1.2, information 1.5.2, information 2
ct information » cost information, get information, iot information
technology ct » technology cost, technology can, technology 1
networks du » networks _, networks 1, networks a
de afrique » de l'afrique, en afrique, l afrique
5.4 iot » 5.4 cost

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

• Adding a wildcard symbol may retrieve word variants: technology ct information 5.4 iot data communications networks du developpement de afrique.*.