Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications costs » communication costs, communications _
case information » care information, based information, phase information
techniques case » techniques laser, techniques based, techniques cost
information und » informations und
developing asia » development asia, developing a
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
der mobile » der mobilen, der mobil, does mobile
costs 2.2 » costs 4.2, costs 2.3, cost 2.2
asezs. » sezs., aezs.

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

• Adding a wildcard symbol may retrieve word variants: techniques case information und der mobile communications costs 2.2 developing asia asezs.*.