Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
long thanh » luong thanh, long han, long trinh
fang yuan » wang yan, meng yuan, tang yun
yang lin » yang jin, wang lin, yang liang
chang n » chang _, chang c, chang ann
yang li » yang xi, yang yi, tang li
n gain » _ gain, run gain

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((fang yuan) OR (wang yuhan)) chang n gain ((((yang lin) or (yang li))) or (yang di)) long thanh ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((fang yuan) OR (wang yuhan)) chang n gain ((((yang lin) OR (yang li))) OR (yang di)) long thanh ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((fang yuan) OR (wang yuhan)) chang n gain ((((yang lin) or (yang li))) or (yang di)) long thanh ;".
• Adding a wildcard symbol may retrieve word variants: ((fang yuan) OR (wang yuhan)) chang n gain ((((yang lin) or (yang li))) or (yang di)) long thanh ;*.