Perhaps you should try some spelling variations:
developpement durable » developpement de
communication medium » communication mediums, communication media, communications media
de communication » mobile communication, online communication
de developpement » sme development
technologien i » technologien im, technologien _, technologien 1
informal out » informal oath, informal output, informal group
i informal » _ informal, 3 informal, 8 informal
out value » about value, lost value, net value
medium de » medium der, medium des, medium die
value de » value dave, value does, value add

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

• Adding a wildcard symbol may retrieve word variants: technologien i informal out value de communication medium de developpement durable afrique.*.