Perhaps you should try some spelling variations:
ddr communication » de communication, csr communication, under communication
from information » from informal, 1 information
information case » information based, information can, information costs
4.3 developing » 3.3 developing, 1.3 developing, 7.3 developing
costs 4.3 » costs 4.2, costs 4.4, costs 2.3
case des » cases des, case das, phase des
des ddr » der ddr, des dr, dem ddr

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

• Adding a wildcard symbol may retrieve word variants: technology from information case des ddr communication costs 4.3 developing _ area.*.