Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan
yang liang » wang liang, yan liang, yang yang
wang yang » wang yan, wang liang, wang yanling
siew der » siew ee, snow der
der gang » der umgang
long do » long d, long du, longer do
gang 3 » gang _, lang 3, wang 3
3 long » a long, 2 long, 3.2 long

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 (((yang guang) OR (yang liang)))) (mah OR math) siew der gang 3 long do ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (((yang guang) or (yang liang)))) (mah or math) siew der gang 3 long do ;*.