Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
information 2 » information 3
3 developing » 3 development
developing 2 » developing _, developing a, developing e
die mobile » does mobile, das mobile, day mobile
costs 3 » costs _, costs 4, costs a
2 areal » 2 real, _ areal, 2 areas

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information 2 die mobile communications costs 3 developing 2 areal.*.