Perhaps you should try some spelling variations:
communication between » communication networks
technologies based » technologies used, technology based, technologies a
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
based formation » based information, based deformation, based formative
4 communication » 3 communication, 5.4 communication, de communication
formation des » formation _
between des » between de, between modes, between nodes
des deces » de deces, les deces, des dechets
deces 4 » deces a, deces 4.1, deces 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies based formation des deces 4 communication between des developpement en afrique.*.