Perhaps you should try some spelling variations:
information centers » information contents, information officers
den communication » open communication, lean communication, when communication
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
7.3 developing » 3.3 developing, 1.3 developing, 2.2 developing
centers 3.1 » center 3.1, centers 3.3, centers 3.8
costs 7.3 » costs 2.3, costs 4.3, costs 5.3
3.1 den » 3.1 der, 3.1 de, 3.1 def

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 3.1 den communication costs 7.3 developing _ africa.*.