Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
information 13 » information 1.3, information 3, information 1
3 developing » 3 development
developing a » developing _
costs 3 » costs _, costs 4, costs a
a areal » _ areal, 2 areal, 4 areal
13 und » 1933 und
und de » und der, und des, und den

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 13 und de communication costs 3 developing a areal.*.