Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
technologien des » technologien fur, technologien und, technologies 2
des informations » aids information
de developpement » sme development
des afrique » en afrique, de l'afrique
und each » und east
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: technologien des informations und each voice communication a de developpement des afrique.*.