Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
development 2 » development 1, development 2.1, development 2.3
des personal » des personals, der personal, das personal
costs des » costs fees
costs 2 » costs 20, costs _, costs 4
2 areas » 1 areas, 2 areal, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information costs des personal communication costs 2 development 2 areas.*.