Perhaps you should try some spelling variations:
radio communication » crisis communication, data communication
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
mode radio » more radio
3.2 mode » 3.2 model, 3.2 modes, 3.2 more
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: technologies a information 3.2 mode radio communication a des developpement en afrique.*.