Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologies 2 » technologies _, technologies 4
3.3 developing » 4 developing, 2 developing, 1 developing
costs das » costs case, costs cash, costs data
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
das oral » das orakel, das organ, u.s oral

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 das oral communication costs 3.3 developing _ access.*.