Perhaps you should try some spelling variations:
debt communication » de communication, et communication, get communication
communication cost » communication costs, communication costa, communications costs
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
contents due » contents auf, contents je, contents data
due debt » does debt, pure debt, run debt
cost 2.3 » costs 2.3, cost 2.4, cost 2.2

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

• Adding a wildcard symbol may retrieve word variants: technologien des information contents due debt communication cost 2.3 developing _ africa.*.