Perhaps you should try some spelling variations:
communication costa » communication costs, communications costs, communication cote
5.4 communication » de communication, data communication
12.4 developing » 1.4 developing, 2.2 developing, 1.3 developing
technologies 2 » technologies _, technologies 4
contents 2.3 » content 2.3, contents 2.1, contents 2.5
developing e » developing _, developing a, developing east
costa 12.4 » costs 12.4, cost 2.4, cost 14.4
e africa » em africa, de africa, eu africa
2.3 5.4 » 2.3 2.4, 2013 5.4

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 2.3 5.4 communication costa 12.4 developing e africa.*.