Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
challenges min » challenges m, challenges making, challenges moving
min hyoung » min hong, mun young
hyoung hai » hong hai
wang yang » wang yan, wang liang, wang yanling
3 present » _ present
yang xi » yang di, yang yi, yang jui
ong e » ong ye, ong _
e 3 » es 3, eu 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))ong e 3 present challenges min hyoung hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang xi))ong e 3 present challenges min hyoung hai ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang xi))ong e 3 present challenges min hyoung hai ;*.