Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
hyoung hai » hong hai
wang yang » wang yan, wang liang, wang yanling
a present » _ present, 3 present, 2 present
1 hyoung » _ young, a young, 3 young
yang yi » yang di, yang xi, yang jui
ng a » lng a, ngo a, png a
a a » a la

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 a a present challenges 1 hyoung hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang yi))ng a a present challenges 1 hyoung hai ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang yi))ng a a present challenges 1 hyoung hai ;*.