Perhaps you should try some spelling variations:
information centers » information contents, information officers
communication cost » communication costs, communication costa, communications costs
das communication » mass communication, c's communication, lea's communication
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
developing e » developing _, developing a, developing east
centers 3.3 » centers 3.8, centers 4.3, century 3.3
e africa » em africa, de africa, eu africa
3.3 das » 2.3 das, 3.3 data

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information centers 3.3 das communication cost _ developing e africa.*.