Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
ec communication » de communication, 3 communication, 4 communication
technologies 2 » technologies _, technologies 4
5.4 developing » 6.4 developing, 3.3 developing, 2.2 developing
developing a » developing _
contents 21 » contents 2.1, contents 1, contents 01
cost 5.4 » costs 5.4, cost 2.4, cost 3.4
a africa » 1 africa, can africa, em africa
21 ec » 24 ec

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 21 ec communication cost 5.4 developing a africa.*.