Perhaps you should try some spelling variations:
chen cheng » chen chung, chen zheng, chen zhen
cheng ming » cheng bing, cheng ling, chen ping
quan guan » gan guan, quan guo
yan guan » gan guan, yang guang, yihan guan
yan yuan » fang yuan, nan yan, yan clan
code shu » code ctu
yi chen » jui chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan ((((yan guan) OR (yan yuan))) or (quan guan)) yi chen cheng ming code shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan ((((yan guan) OR (yan yuan))) OR (quan guan)) yi chen cheng ming code shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((((yan guan) OR (yan yuan))) or (quan guan)) yi chen cheng ming code shu ;*".