Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologies daf » technologies dans, technologies a, technologies de
daf information » f information, math information, 2 information
4 development » 2 development, 4 developing
china afrique » china africa
costs 4 » costs _, costs a, costs 4.2

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies daf information _ wide data communications costs 4 development china afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies daf information _ wide data communications costs 4 development china afrique.*.