Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
information costs » information contents, information centers, information content
technologien und » technologie und, technologien des, technologien fur
de communication » mobile communication, online communication
und information » fund information, road information, award information
3.2 developing » 3.3 developing, 2.2 developing, 3 developing
developing 4 » developing _, developing a, developing e
cost 3.2 » cost 2.4
debt de » debt do, debt debt, debt gdp
4 areas » 1 areas, 2 areas, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technologien und information costs debt de communication cost 3.2 developing 4 areas.*.