Perhaps you should try some spelling variations:
recent challenges » present challenges, recent changes, treatment challenges
wang yang » wang yan, wang liang, wang yanling
amin hong » among hong, tin hong, asia hong
3 recent » 1 recent, 4 recent
min hong » tin hong, min hyoung, min jeong
yang xi » yang di, yang yi, yang jui
ya 3 » a 3, 2a 3, 4a 3

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (yang xi))ng ya 3 recent challenges ((min hong) OR (amin hong)) g ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang xi))ng ya 3 recent challenges ((min hong) OR (amin hong)) g ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (yang xi))ng ya 3 recent challenges ((min hong) OR (amin hong)) g ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang xi))ng ya 3 recent challenges ((min hong) OR (amin hong)) g ;*.