Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien ad » technologien am, technologien und, technologien als
developing asia » development asia, developing a
ad information » d information, nd information, od information
4 developing » 3 developing
asia areas » basic areas, aside areas, basin areas
costs des » costs fees
des oral » des moral, des oil, des orts
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: technologien ad information costs des oral communication costs 4 developing asia areas.*.