Perhaps you should try some spelling variations:
oral communication » personal communication
information case » information based, information can, information costs
technologies 2 » technologies _, technologies 4
3.5 developing » 3.3 developing, 3.2 developing, 1.5 developing
costs 3.5 » costs 4.2, costs 4.4, costs 2.3
case das » case des, case case, case data
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 case das oral communication costs 3.5 developing _ access.*.