Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
der personal » der personalen, der personen, der person
costs der » costs differ
1 areas » 1 area, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information costs der personal communication costs _ development 1 areas.*.