Perhaps you should try some spelling variations:
ddr communication » de communication, csr communication, under communication
information case » information based, information can, information costs
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
costs 2.3 » costs 4.2, costs 4.4
a areas » 1 areas, 2 areas, all areas
4 areas » 1 areas, 2 areas, 4 areal
case d » case 1, case 2, case 3
d ddr » d der, d dr, _ ddr

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 d ddr communication costs 2.3 developing ((a areas) OR (4 areas)).~".
• Adding a wildcard symbol may retrieve word variants: technologien _ information case d ddr communication costs 2.3 developing ((a areas) OR (4 areas)).*.