Perhaps you should try some spelling variations:
yan yuan » yan guan, fang yuan, yan clan
yang yue » wang yue, yang yun, yang jui
dan yang » daun yang, tan yang, wang yang
xi chang » ii chang, xi zhang, yi chang
xi cheng » _ cheng, yi chen, li chen
nan yan » nan ya, wang yan, qian yan
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang hyoung ((((yan yuan) or (yang yue))) or (nan yan)) dan yang ((xi chang) OR (xi cheng)) chen ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hyoung ((((yan yuan) OR (yang yue))) OR (nan yan)) dan yang ((xi chang) OR (xi cheng)) chen ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((((yan yuan) or (yang yue))) or (nan yan)) dan yang ((xi chang) OR (xi cheng)) chen ;*".