Perhaps you should try some spelling variations:
yuhuan hong » yuhuan huang
liang chen » chang chen, kang chen, zhigang chen
cheng hei » chen wei, cheng han, chen lei
cheng yi » cheng y, chong yi, cheng sim
yan jun » yang jun, yan kun, san juan
wang » wing, wan, lang
choon » choo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan jun ((liang chen) OR (liang choon)) yuhuan hong ((cheng yi) OR (cheng hei)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan jun ((liang chen) or (liang choon)) yuhuan hong ((cheng yi) OR (cheng hei)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan jun ((liang chen) or (liang choon)) yuhuan hong ((cheng yi) OR (cheng hei)) ;*.