Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
technologies 2 » technologies _, technologies 4
des personal » des personals, der personal, das personal
developing a » developing _
costs des » costs fees
a areas » 1 areas, 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: technologies 2 information costs des personal communication costs _ developing a areas.*.