Perhaps you should try some spelling variations:
african countries » rich countries
asian countries » union countries, riparian countries, client countries
arab countries » market countries, across countries
host countries » poor countries, host country
europe's host » europe's best, europe's hope

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( europe's ((asian countries) OR (african countries)). ) or ((( europe's arab countries. ) or ( europe's host countries. ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( europe's ((asian countries) OR (african countries)). ) OR ((( europe's arab countries. ) OR ( europe's host countries. )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( europe's ((asian countries) OR (african countries)). ) or ((( europe's arab countries. ) or ( europe's host countries. ))))".
• Adding a wildcard symbol may retrieve word variants: (( europe's ((asian countries) OR (african countries)). ) or ((( europe's arab countries. ) or ( europe's host countries. ))))*.