Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4.2 development » 3.2 development, 2.3 development, 1 development
technologies 3 » technologies _, technologies 4, technologies 2
3 information » 1 information
china afrique » china africa
de data » e data, wide data, de datos

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 3 information _ de data communications costs 4.2 development china afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies 3 information _ de data communications costs 4.2 development china afrique.*.