Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
des informations » aids information
techniques des » techniques de, technique des, techniques dans
3 developing » 3 development
developing a » developing _
der mobile » der mobilen, der mobil, does mobile
costs 3 » costs _, costs 4, costs a
a areas » 1 areas, 2 areas, 4 areas
und » fund

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

• Adding a wildcard symbol may retrieve word variants: techniques des informations und der mobile communications costs 3 developing a areas.*.