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
tan siew » tham siew, mah siew, man sie
hai yang » hui yang, hai anh, yao yang
3.2 long » 3.2 land
6.2 long » 3.1 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 (yan guan)))) tan siew hai yang ((3.2 long) OR (6.2 long)) do ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (((yang guang) OR (yan guan)))) tan siew hai yang ((3.2 long) or (6.2 long)) do ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (((yang guang) OR (yan guan)))) tan siew hai yang ((3.2 long) or (6.2 long)) do ;*.