Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
longer do » longer _, longer a
long do » long d, long du, long ago
yang 3 » yang _, yang 8, lang 3
gang 3 » gang _, lang 3, wang 3
wang » wing, wan, lang
mah » math
siew » view, sie

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