Perhaps you should try some spelling variations:
twitter communication » written communication, better communication, matter communication
technologies used » technologies based, technology used, technologies _
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
used innovation » user innovation, use innovation, based innovation
innovation 4 » innovation _, innovation a, innovation 1
das twitter » data twitter, der twitter, das wetter
4 das » 1 das, 2 das, 3 das

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

• Adding a wildcard symbol may retrieve word variants: technologies used innovation 4 das twitter communication _ de developpement en afrique.*.