Perhaps you should try some spelling variations:
technologies 2.1 » technologies _, technologies 4, technologies a
de communication » mobile communication, online communication
2.1 information » 3.1 information
4 developing » 3 developing
developing 1 » developing _, developing a, developing e
contents 3 » contents 1, contents _, contents i
costs 4 » costs _, costs a, costs 4.2
3 de » 3 die, 3 der, 3 des

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information contents 3 de communication costs 4 developing 1 africa.*.