Perhaps you should try some spelling variations:
deux developpements » des developpements, de developpement, du developpement
technologies based » technologies used, technology based, technologies a
sign communication » open communication, human communication, 3 communication
developpements de » developpement de, developpement des, developpement du
based innovation » und innovation
innovation 2 » innovation 1, innovation 4, innovation 3
das sign » das design, das singen, das sich
2 das » 1 das

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

• Adding a wildcard symbol may retrieve word variants: technologies based innovation 2 das sign communication a deux developpements de l'afrique.*.