Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
das communication » mass communication, c's communication, lea's communication
4 developing » 3 developing
developing 1 » developing _, developing a, developing e
contents 3 » contents 1, contents _, contents i
cost 4 » cost _, cost 2.4
3 das » 1 das, 2 das

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

• Adding a wildcard symbol may retrieve word variants: technologien _ information contents 3 das communication cost 4 developing 1 africa.*.