Perhaps you should try some spelling variations:
personal communications » personal communication, interpersonal communications, internal communications
communications costs » communication costs, communications _
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
developing based » development based, developing asia, developing east
4 developing » 3 developing
de personal » der personal, des personal, de persona
based areal » based real, base areas, based animal
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 aids information _ de personal communications costs 4 developing based areal.*.