Perhaps you should try some spelling variations:
yuhan huang » yuhuan huang
china zhang » china chang, cheng zhang, china han
wang yuhan » wang luhang, wang yan, wang yidan
chin chang » china chang, chain change, colin chang
huang yi » huang di, huang ying, huang bin
can cong » yan cong, can hong, can count

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuhan huang yi ((china zhang) or (chin chang)) can cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuhan huang yi ((china zhang) OR (chin chang)) can cong shu ;*.