Perhaps you should try some spelling variations:
yuen cheng » yuan cheng, yu cheng, yun chen
cheng leon » cheng leong, cheng boon, ching leo
zhong zhi » hong ghi, zhong tai
zhang zhi » wang zhi, zhang wei, zhang dai
wang chi » wang zhi, wang chau, wang chun
chi yuen » chih yuan, cui yue
leon li » leon l, leon la, leon le

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 OR wing) OR lang) wang chi yuen cheng leon li ((zhong zhi) OR (zhang zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang or wing) or lang) wang chi yuen cheng leon li ((zhong zhi) OR (zhang zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang or wing) or lang) wang chi yuen cheng leon li ((zhong zhi) OR (zhang zhi)) ;*.