Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
information based » information case, information bank, transformation based
do communications » 10 communications, 14 communications, 2 communications
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
4 developing » 3 developing
developing e » developing _, developing a, developing east
based debt » based deep, based direct
debt do » debt gdp, debt how
costs 4 » costs _, costs a, costs 4.2
e 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 based debt do communications costs 4 developing e areas.*.