Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
developing china » developing china's, development china, developing caring
technologies 2 » technologies _, technologies 4
und personal » und personen, und person, und personelle
4 developing » 3 developing
china asia » china asean
costs und » costs used, costs united, costs edmund
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: technologies 2 information costs und personal communication costs 4 developing china asia.*.