Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
technologies 2.1 » technologies _, technologies 4, technologies a
ec communication » de communication, 3 communication, 4 communication
2.1 information » 3.1 information
1.4 developing » 12.4 developing, 1.3 developing, 14 developing
developing iv » developing av, developing ict, developing cil
contents he » contents je, contents head, contents how
iv africa » v africa, 1 africa, em africa
cost 1.4 » cost 14.4, cost 2.4, cost 1.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information contents he ec communication cost 1.4 developing iv africa.*.