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
case des » cases des, case das, phase des
des ddr » der ddr, des dr, dem ddr
costs 4 » costs _, costs a, costs 4.2
a areas » 1 areas, 2 areas, all areas
4 areas » 1 areas, 2 areas, 4 areal

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologien _ information case des ddr communication costs 4 developing ((a areas) OR (4 areas)).~".
• Adding a wildcard symbol may retrieve word variants: technologien _ information case des ddr communication costs 4 developing ((a areas) OR (4 areas)).*.