Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
paper communications » power communication, face communications, layer communication
information content » information contents, information centers, information centre
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
4 developing » 3 developing
content 3 » content _, content 1
3 paper » 13 paper, 3 papers, _ paper
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 des information content 3 paper communications costs 4 developing _ africa.*.