Perhaps you should try some spelling variations:
chen zheng » chen zhen, chen aizheng, cheng zhang
zheng min » zhang ming, cheng ming, chang min
jeong shu » jeong su, cong shu
jeong mi » jeong _, jeong su, jeong 情
wan yan » wang yan, nan yan, wai yan
yan gan » yan guan, yan clan, yan wang
li chen » 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 gan li chen zheng min ((jeong shu) or (jeong mi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan gan li chen zheng min ((jeong shu) OR (jeong mi)) ;*.