Perhaps you should try some spelling variations:
improving countries » importing countries, borrowing countries, emerging countries
training services » planning services, banking services
gap improving » up improving, ghana improving, data improving
21st training » post training, 21 training, best training
supply 21st » supply cost, supply costs, supply asset
supply gap » supply a

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply gap improving countries. ) or ( supply 21st training services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply gap improving countries. ) OR ( supply 21st training services. )).
• Adding a wildcard symbol may retrieve word variants: (( supply gap improving countries. ) or ( supply 21st training services. ))*.