Perhaps you should try some spelling variations:
information cases » information case, information classes, information costs
ddr communication » de communication, csr communication, under communication
technologien dis » technologien des, technologien als, technologien im
dis information » mis information, aids information, des informations
4.4 developing » 5.4 developing, 6.4 developing, 1.4 developing
developing 4 » developing _, developing a, developing e
costs 4.4 » costs 4.2
des ddr » der ddr, des dr, dem ddr
4 areal » 4 real, _ areal, 2 areal

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

• Adding a wildcard symbol may retrieve word variants: technologien dis information cases des ddr communication costs 4.4 developing 4 areal.*.