Perhaps you should try some spelling variations:
debt communication » de communication, et communication, get communication
technologien und » technologie und, technologien des, technologien fur
und information » fund information, road information, award information
1.3 developing » 3.3 developing, 13 developing, 7.3 developing
contents 2.1 » contents 12.1, contexts 2.1, contents 3.1
costs 1.3 » costs 12.3, costs 14.3, costs 15.3
2.1 debt » 2.5 debt, 2.3 debt, 2.1 debate

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

• Adding a wildcard symbol may retrieve word variants: technologien und information contents 2.1 debt communication costs 1.3 developing _ africa.*.