Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
wang liang » wang yang
3 present » _ present
hong ghi » zhong zhi, hong g, hong hai
yang xi » yang yi, yang jui
1 hong » _ hong, a hong, 2 hong
png a » png _, lng a, peg a
leg a » lee a, leg _, let a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang liang) or (((yang xi) or (yang di))))((png a) or (leg a)) 3 present challenges 1 hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang liang) OR (((yang xi) OR (yang di))))((png a) OR (leg a)) 3 present challenges 1 hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: ((wang liang) or (((yang xi) or (yang di))))((png a) or (leg a)) 3 present challenges 1 hong ghi ;*.