Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
technologien des » technologien fur, technologien und, technologies 2
information when » information what, information war, information wants
de developpement » sme development
developpement de » developpement des, developpement durable
des information » des informations, does information, dis information
de afrique » de l'afrique, en afrique, l afrique
when data » open data
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 information when data voice communication a de developpement de afrique.*.