Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologien series » technologies series, technology series, technologies varies
series information » business information
do communications » 10 communications, 14 communications, 2 communications
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
developing a » developing _
costs 2.2 » costs 4.2, costs 2.3, cost 2.2
4.2 debt » 4.2 der, 4.2 deep, 2.5 debt
debt do » debt gdp, debt how
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 series information 4.2 debt do communications costs 2.2 developing a areas.*.