Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien des » technologien fur, technologien und, technologies 2
developing areas » developing asia, developing east, developing a
des information » des informations, does information, dis information
areas areas » areas arenas, seas areas, areas access
costs 11.4 » costs 11.1, costs 11.7, costs 12.4
11.4 oral » 14.4 oral, 14 oral, 5.4 oral

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

• Adding a wildcard symbol may retrieve word variants: technologien des information costs 11.4 oral communication costs _ developing areas areas.*.