Perhaps you should try some spelling variations:
level communication » level communications, cell communication, event communication
technologies used » technologies based, technology used, technologies _
la developpement » le developpement, de developpement, et developpement
developpement en » developpement et, developpement des, developpement de
used innovation » user innovation, use innovation, based innovation
innovation 3.1 » innovation 2.1, innovation 4.1, innovation 3.2
has level » gas levels, has ever, has never
3.1 has » 3.1 phase, 3.1 hard, 3.1 hate

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

• Adding a wildcard symbol may retrieve word variants: technologies used innovation 3.1 has level communication a la developpement en afrique.*.