Perhaps you should try some spelling variations:
yan zhang » yuan chang, bin zhang, han chang
zhang wei » zhen wei
sang minh » kang minah, anh minh, song min
wong shiu » wong siu, cong shu, song shin
gong hui » tong hui, tong shui, wang hui
wang » wing, wan, lang
kil » kiel, kill, keil

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan zhang wei kil sang minh ((wong shiu) or (gong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan zhang wei kil sang minh ((wong shiu) OR (gong hui)) ;*.