Perhaps you should try some spelling variations:
kyoung yun » young yun, kyoung yang, hyoung gun
boon siong » soon siong, boon chong
siong tan » hong tan, liang tan, wing tan
yan yuan » fang yuan, nan yan, yan clan
yan guan » gan guan, yang guang, yihan guan
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 siong tan hua ren ((yan yuan) or (yan guan)) kyoung yun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: boon siong tan hua ren ((yan yuan) OR (yan guan)) kyoung yun ;*.