Perhaps you should try some spelling variations:
ritter communication » written communication, twitter communication, better communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
technologie de » technologies de, technologie der, technologie die
de innovation » die innovation, dre innovation, de l'innovation
der ritter » der dritten, der richter, der twitter
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: technologie de innovation _ der ritter communication a de developpement en afrique.*.