Perhaps you should try some spelling variations:
information case » information based, information can, information costs
de communication » mobile communication, online communication
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
3.3 developing » 4 developing, 2 developing, 1 developing
developing a » developing _
case debt » rate debt, case des
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
debt de » debt do, debt debt, debt gdp
a areas » 1 areas, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information case debt de communication costs 3.3 developing a areas.*.