Perhaps you should try some spelling variations:
chen zhang » cheng zhang, zhen zhang, chen zheng
zhang xin » zhang jian, zhang ming, zhang fan
jeong shu » jeong su
lang yan » wang yan, wang yang, zhang yan
yan yan » yan yuan, nan yan, yang yang
zi chen » zhi chen, yi chen, li chen
yan zi » yan zhi, yuan zi, ban zi

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yan zi chen zhang xin ((jeong shu) or (cong shu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan yan zi chen zhang xin ((jeong shu) OR (cong shu)) ;*.