Perhaps you should try some spelling variations:
information centers » information contents, information officers
oral communication » personal communication
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
developing 2.4 » developing _, developing a, developing e
4 developing » 3 developing
centers des » centre des, centers case, centers help
2.4 access » 7.4 access, 2.3 access, 2.6 access
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 als information centers des oral communication costs 4 developing 2.4 access.*.