Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
de communication » mobile communication, online communication
information can » information case, information 1, information 1.2
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
developing a » developing _
can debt » bank debt, card debt, loan debt
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
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 aids information can debt de communication cost 2.2 developing a areas.*.