Perhaps you should try some spelling variations:
present challenges » current challenges, assessment challenges
challenges tan » challenges call, challenges time, challenges 1
3 present » _ present
wang yang » wang yan, wang liang, wang yanling
yang jui » yang judy, yang di, yang xi
hong hai » shang hai, zhong tai, dang hai
ng y » ng _, g y, na y
y 3 » y 35, my 3, y 36

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 jui))ng y 3 present challenges tan hong hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (yang jui))ng y 3 present challenges tan hong hai ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (yang jui))ng y 3 present challenges tan hong hai ;*.