Perhaps you should try some spelling variations:
information costs » information contents, information centers, information content
de communication » mobile communication, online communication
technologies 2 » technologies _, technologies 4
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
developing e » developing _, developing a, developing east
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
fees de » fees re, redes de, deces de
e areas » 1 areas, 2 areas, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information costs fees de communication costs 4.1 developing e areas.*.