Perhaps you should try some spelling variations:
oral communication » personal communication
technologien aids » technologien als, technologien ad, technologien des
information costs » information contents, information centers, information content
aids information » chandos information, series information
development 1.1 » development 2.1, development 2.3, development 2.2
1.1 access » 3.1 access, 5.1 access, 10 access
costs 2 » costs 20, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information costs _ oral communication costs 2 development 1.1 access.*.