Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologien des » technologien fur, technologien und, technologies 2
information case » information based, information can, information costs
do communication » do communications, de communication, ngo communication
des information » des informations, does information, dis information
3.3 developing » 4 developing, 2 developing, 1 developing
developing 1 » developing _, developing a, developing e
case debt » rate debt, case des
cost 3.3 » cost 3.2, cost 2.3, cost 3.4
debt do » debt gdp, debt how
1 areas » 1 area, 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 des information case debt do communication cost 3.3 developing 1 areas.*.