Perhaps you should try some spelling variations:
ddr communication » de communication, csr communication, under communication
information case » information based, information can, information costs
4 developing » 3 developing
developing a » developing _
case dem » case des, case d, case d1
dem ddr » der ddr, dem der, den ddr
costs 4 » costs _, costs a, costs 4.2
a areas » 1 areas, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien _ information case dem ddr communication costs 4 developing a areas.*.