Perhaps you should try some spelling variations:
yan yuan » fang yuan, yan clan, yan kun
yan guan » gan guan, yang guang, yihan guan
zheng he » cheng hei, zheng lei, zheng yu
wong sau » wong sam, wong siu, wong shiu
nan yan » nan ya, wang yan, qian yan
li chen » yi chen, jui chen
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 ((((yan yuan) OR (yan guan))) OR (nan yan)) li chen ((aizheng he) OR (zheng he)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yan yuan) or (yan guan))) or (nan yan)) li chen ((aizheng he) OR (zheng he)) wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((((yan yuan) or (yan guan))) or (nan yan)) li chen ((aizheng he) OR (zheng he)) wong sau ;*.