Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information rate » information ratio, information related, information matter
de communication » mobile communication, online communication
technologien am » technologien im, technologien als, technologie im
am information » guam information, palm information, crm information
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
rate debt » private debt
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
debt de » debt do, debt debt, debt gdp

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

• Adding a wildcard symbol may retrieve word variants: technologien am information rate debt de communication cost 2.2 developing _ areas.*.