Perhaps you should try some spelling variations:
soon siong » boon siong, soon seng, soon soon
siong wang » hong wang, ping wang
hyoung gun » young eun
yan yuan » fang yuan, nan yan, yan clan
yan guan » gan guan, yang guang, yihan guan
wang yu » wang yue, sang yu, wann yu
yu chen » yu cheng, yi chen, yulu chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: soon siong wang yu chen ((yan yuan) or (yan guan)) hyoung gun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soon siong wang yu chen ((yan yuan) OR (yan guan)) hyoung gun ;*.