Perhaps you should try some spelling variations:
china zhang » china chang, cheng zhang, chin chang
yang yang » wang yang, wang yan
era china » a china
yan yuan » fang yuan, nan yan, yan clan
yan guan » gan guan, yang guang, yihan guan
fan wang » yan wang, qian wang, yuan wang
wang hui » wang hua, wang zhi, wang wei

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wang or lang) ((((yan yuan) OR (yan guan))) or (yang yang)) era china zhang fan wang hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR lang) ((((yan yuan) OR (yan guan))) OR (yang yang)) era china zhang fan wang hui ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) ((((yan yuan) OR (yan guan))) or (yang yang)) era china zhang fan wang hui ;*".