Perhaps you should try some spelling variations:
informations century » information centers, information centre, information center
technologien als » technologien des, technologien fur, technologien und
als informations » als information, des informations, a informations
4 developing » 3 developing
century how » century book
how mobile » non mobile, go mobile, new mobile
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 informations century how mobile communication costs 4 developing _ africa.*.