Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
3.3 developing » 4 developing, 2 developing, 1 developing
contents 2.5 » contents 2.1, contents 2.3, contents 5.2.5
developing a » developing _
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
a africa » 1 africa, can africa, em africa
2.5 de » 2.5 die, 2.5 der, 2.5 dve

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information contents 2.5 de communication costs 3.3 developing a africa.*.