Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yidan, fang yuan
wang yang » wang liang, wang yanling
song min » song ming, jong min, song jin
gong min » jong min, gong meng, song ming
wong sau » wong sam, wong siu, wong shiu
wang a » wang _, fang a, lang a
a when » 3 when, 4 when, 1 when

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (((wang yuhan) OR (wang yan)))) wang a when ((song min) OR (gong min)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (((wang yuhan) OR (wang yan)))) wang a when ((song min) or (gong min)) wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (((wang yuhan) OR (wang yan)))) wang a when ((song min) or (gong min)) wong sau ;*.