Perhaps you should try some spelling variations:
optical communications » optic communication, political communication, digital communications
does developpement » de developpement, des developpements, does development
communications a » communications _, communications law, communications media
apologien die » apologien der, apologia de, apologie des
die variation » de variation, does variation, der variation
der optical » der optimale, der optimalen, depth optical
des afrique » en afrique, de l'afrique
a does » 2 does, 4 does, 1 does

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

• Adding a wildcard symbol may retrieve word variants: apologien die variation _ der optical communications a does developpement des afrique.*.