Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
sing dong » sing kong, shin dong
jeng dong » eng hong, zeng doug
yuan hui » yuan fei, jaan hui, tuan hua
nan yan » nan ya, wang yan, qian yan
yuan zi » yan zi, yuan li, yuan fei
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: nan yan ((yuan hui) or (yuan zi)) cheng zhang ((sing dong) OR (jeng dong)) sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan ((yuan hui) OR (yuan zi)) cheng zhang ((sing dong) OR (jeng dong)) sin ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan yan ((yuan hui) or (yuan zi)) cheng zhang ((sing dong) OR (jeng dong)) sin ;*".