Perhaps you should try some spelling variations:
optic communication » optical communications, public communication, device communication
does development » dams development, ides development, smes development
development des » development does, development desd, development ds
apologien der » typologien der, apologie des, ideologien der
der variation » de variation, does variation, die variation
des afrique » en afrique, de l'afrique
der optic » der option, der opec, der optes
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 der variation _ der optic communication a does development des afrique.*.