Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
qian wang » yiqian wang, qian rong, qian yan
yuan wang » yan wang, yuan kang, yuan chang
hua cheng » hua chen, huang cheng, yuan cheng
zhang xin » zhang jian, zhang ming, zhang fan
tong seo » hong seo, kong sek, von seo
yan hua » tan hua, ya hua, wang hua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((qian wang) or (yuan wang)) yan hua cheng zhang xin tong seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((qian wang) OR (yuan wang)) yan hua cheng zhang xin tong seo ;*.