Perhaps you should try some spelling variations:
information costs » information contents, information centers, information content
ddr communication » de communication, csr communication, under communication
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
developing a » developing _
costs des » costs fees
costs 2.3 » costs 4.2, costs 4.4
des ddr » der ddr, des dr, dem ddr
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 costs des ddr communication costs 2.3 developing a areas.*.