Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
technologie und » technologies 2.1
und information » fund information, road information, award information
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
contents 3.1 » contents 1, contents _, contents map
developing 1 » developing _, developing a, developing e
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
3.1 de » 3.1 die, 3.1 der, 3.1 def

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

• Adding a wildcard symbol may retrieve word variants: technologie und information contents 3.1 de communication cost 2.2 developing 1 africa.*.