Perhaps you should try some spelling variations:
singen communication » sign communication, sincere communication, spoken communication
des developpements » deux developpements, de developpement, et developpements
developpements de » developpement de, developpement des, developpement du
technologies und » technologie und, technologien und, technologies under
innovation 2 » innovation 1, innovation 4, innovation 3
das singen » das ringen, das sinken, das besingen
2 das » 1 das
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 und innovation 2 das singen communication a des developpements de l'afrique.*.