Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
wang yang » wang yan, wang liang, wang yanling
pei gang » wei guang, der gang, ii gang
pei yang » wei yang, hui yang, pei yun
long do » long d, long du, longer do
3 long » a long, 2 long, 3.2 long
mah » math

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) OR (yang guang)) mah siew ((pei gang) OR (pei yang)) 3 long do ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) OR (yang guang)) mah siew ((pei gang) OR (pei yang)) 3 long do ;*.