Perhaps you should try some spelling variations:
challenges m » challenges 1, challenges 3, challenges 5
hyoung hai » hong hai
wang yang » wang yan, wang liang, wang yanling
a present » _ present, 2 present, 5 present
3 present » _ present
m hyoung » min hyoung, _ young, a young
yang yi » yang di, yang xi, yang jui

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 yi))ng ya ((a present) OR (3 present)) challenges m hyoung hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang yi))ng ya ((a present) OR (3 present)) challenges m hyoung hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (yang yi))ng ya ((a present) OR (3 present)) challenges m hyoung hai ;*".