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

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