Perhaps you should try some spelling variations:
hyoung yan » kyoung yang, kyoung yun, young yun
hyoung gun » young eun
hua rene » hua ren, juan rene
yang jin » yang jie, yang jun, ying jin
long shu » cong shu, tong shui, long du
yan jiu » yang jie, pang jiu
wang » wing, wan, lang

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 ((hyoung yan) OR (hyoung gun)) hua rene ((yan jiu) OR (yang jin)) long shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((hyoung yan) OR (hyoung gun)) hua rene ((yan jiu) or (yang jin)) long shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((hyoung yan) OR (hyoung gun)) hua rene ((yan jiu) or (yang jin)) long shu ;*.