Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
boon chong » boon siong, joon chang
kyoung yun » young yun, kyoung yang, hyoung gun
chong tan » hong tan, chong wan, choong wan
yan yuan » yan guan, fang yuan, nan yan
tan hua » tuan hua, wang hua, tan chia
hua ren » hua chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: boon chong tan hua ren ((yan yuan) or (yang guang)) kyoung yun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: boon chong tan hua ren ((yan yuan) OR (yang guang)) kyoung yun ;*.