Perhaps you should try some spelling variations:
yong yang » dong yang, ying yang, kyoung yang
yang yang » wang yang, wang yan
liu gang » liu gangs, liu yang, li gang
gang min » gong min, tang min, chang min
wong sau » wong sam, wong siu, wong shiu
von sach » von fach, von sprach, von sa
li liu » liu liu, li lin, li li

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 ((yong yang) OR (yang yang)) li liu gang min ((wong sau) OR (von sach)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yong yang) OR (yang yang)) li liu gang min ((wong sau) or (von sach)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yong yang) OR (yang yang)) li liu gang min ((wong sau) or (von sach)) ;*.