Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
contents 3.1 » contents 1, contents _, contents map
a developing » a development
developing e » developing _, developing a, developing east
3.1 mobile » 2.1 mobile, 1.1 mobile, 7.1 mobile
e africa » em africa, de africa, eu africa
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information contents 3.1 mobile communications costs a developing e africa.*.