Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
4.4 developing » 5.4 developing, 6.4 developing, 1.4 developing
contents 3rd » contents 3.1, contents 3.2, contents arc
costs 4.4 » costs 4.2
3rd data » 3d data, und data, 5d data

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

• Adding a wildcard symbol may retrieve word variants: technologien des information contents 3rd data communications costs 4.4 developing _ africa.*.