Perhaps you should try some spelling variations:
la communication » data communication, data communications
information 4 » information 2
china africa » cpia africa, china asia
networks 2 » networks _, networks 1, networks a
debt la » debt law, debt a, debt land
4 debt » 3 debt, 4 debats

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies _ information 4 debt la communication networks 2 development china africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies _ information 4 debt la communication networks 2 development china africa.*.