Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
zhang sing » zhang ming, zhang jing, zhang ping
sing dong » sing kong, jeng dong, shin dong
yuan hui » yuan fei, jaan hui, tuan hua
wan yan » wang yan, nan yan, wai yan
yuan zi » yuan li, yuan fei, yuan kai
yan zi » yan zhi, ban zi
sing » signg, sindg, sking
sin » sign, sind, skin

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 ((yuan hui) or (((yuan zi) OR (yan zi)))) cheng zhang sing dong sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan ((yuan hui) OR (((yuan zi) OR (yan zi)))) cheng zhang sing dong sin ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan ((yuan hui) or (((yuan zi) OR (yan zi)))) cheng zhang sing dong sin ;*".