Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
3 current » 3 concurrent
yang xi » yang di, yang jui
yang yi » yang di, yang jui
5 hong » _ hong, 2 hong, 5.2 hong
a hong » _ hong, kia hong, tan hong
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 xi) or (yang yi))))ng y 3 current challenges ((5 hong) OR (a hong)) hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (((yang xi) OR (yang yi))))ng y 3 current challenges ((5 hong) OR (a hong)) hai ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (((yang xi) or (yang yi))))ng y 3 current challenges ((5 hong) OR (a hong)) hai ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (((yang xi) or (yang yi))))ng y 3 current challenges ((5 hong) OR (a hong)) hai ;*.