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
4 developing » 3 developing
developing a » developing _
a africa » 1 africa, can africa, em africa
cost 4 » cost _, cost 2.4

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 _ get communication cost 4 developing a africa.*.