Perhaps you should try some spelling variations:
mobilen communications » mobile communications, mobile communication, mobile commusnication
technological trends » technological tools, technology trends, technological changes
communications costs » communication costs, communications _
trends informations » trend information, des informations, credit informations
4 developing » 3 developing
developing 2 » developing _, developing a, developing e
ein mobilen » ein mobiles, einem mobilen, einer mobilen
costs 4 » costs _, costs a, costs 4.2
2 areas » 1 areas, 2 areal, 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: technological trends informations und ein mobilen communications costs 4 developing 2 areas.*.