Perhaps you should try some spelling variations:
singen communication » sign communication, sincere communication, spoken communication
technologies based » technologies used, technology based, technologies a
based innovation » und innovation
de developpement » sme development
developpement de » developpement des, developpement durable
innovation 2 » innovation 1, innovation 4, innovation 3
das singen » das ringen, das sinken, das besingen
2 das » 1 das
a de » a die, a der, a des

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 singen communication a de developpement de l'afrique.*.