Perhaps you should try some spelling variations:
personal communications » personal communication, interpersonal communications, internal communications
communications costs » communication costs, communications _
information 1.5.2 » information 1.2, information 2
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
ein personal » ein persona, non personal, e personal
4 developing » 3 developing
1.5.2 ein » 1.5.2 eine, 1.4.2 ein, 4.5.2 ein
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information 1.5.2 ein personal communications costs 4 developing _ areas.*.