Perhaps you should try some spelling variations:
communication between » communication networks
des developpement » des developpements, de developpement, le developpement
developpement du » developpement de, developpement des, developpement et
formulation des » formation des, formulacion de, formulation _
technologies a » technologies _, technologies 4, technologies 2
a formulation » la formulation, _ formulation, 3 formulation
between des » between de, between modes, between nodes
des drones » des droits, des zones, des dunes
du afrique » en afrique, l afrique, de l'afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies a formulation des drones _ communication between des developpement du afrique.*.