Perhaps you should try some spelling variations:
communications networks » communication networks, telecommunications networks, telecommunications network
technology state » technology strategy, technology system, technology study
do developpement » de developpement, du developpement, le developpement
developpement de » developpement des, developpement durable
state formation » state estimation
formation 4.4 » formation 3.2, formulation 4.2, formulation 4.3
networks do » networks _, networks 1, networks a
de afrique » de l'afrique, en afrique, l afrique
4.4 iot » 4.4 ist, 5.4 iot

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

• Adding a wildcard symbol may retrieve word variants: technology state formation 4.4 iot data communications networks do developpement de afrique.*.