Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
yang yuan » fang yuan, yang yun, wang yuhan
wang yang » wang yan, wang liang, wang yanling
yan yuan » yan guan, fang yuan, nan yan
yang yue » wang yue, yang yun, yang jui
kang hay » kang han, dang hai, kang tae
eang hay » dang hai, kang han

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: yang guang ((yang yuan) OR (yan yuan)) wang yang yue ((kang hay) OR (eang hay)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang guang ((yang yuan) OR (yan yuan)) wang yang yue ((kang hay) or (eang hay)) ;~".
• Adding a wildcard symbol may retrieve word variants: yang guang ((yang yuan) OR (yan yuan)) wang yang yue ((kang hay) or (eang hay)) ;*.