Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
get communication » et communication, debt communication, de communication
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
3.5 developing » 3.3 developing, 3.2 developing, 1.5 developing
contents data » context data, contents a, contents fase
developing de » developing e, developing ce, developing deep
de africa » does africa, de america, use africa
data get » data geht, data great, data gap
cost 3.5 » costs 3.5, cost 3.2, cost 2.5

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 data get communication cost 3.5 developing de africa.*.