Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
de communication » mobile communication, online communication
technologies 4 » technologies _
1.2 developing » 12.2 developing, 13.2 developing, 2.2 developing
4 information » 2 information, 1 information
developing eq » developing e, developing egg, developing _
contents 3.1 » contents 1, contents _, contents map
eq africa » em africa, eu africa, 1 africa
cost 1.2 » cost 3.2, cost 12, cost 2.2
3.1 de » 3.1 die, 3.1 der, 3.1 def

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information contents 3.1 de communication cost 1.2 developing eq africa.*.