Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
technologies 2 » technologies _, technologies 4
developing cil » developing city, developing ai, developing ce
und personal » und personen, und person, und personelle
4 developing » 3 developing
cil africa » cpia africa, can africa, china africa
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 cil africa.*.