Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
get communication » et communication, debt communication, de communication
technologies 4.1 » technologies 2.1, technologies 3.1, technologies 3.2
4.1 information » 3.1 information, 2.1 information, 6.1 information
12 developing » 1.2 developing, 2 developing, 1 developing
contents 3 » contents 1, contents _, contents i
cost 12 » cost 1.2, cost 15, cost 3.2
3 get » _ get, i get, 4 get

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

• Adding a wildcard symbol may retrieve word variants: technologies 4.1 information contents 3 get communication cost 12 developing _ africa.*.