Perhaps you should try some spelling variations:
wing hyoung » wang hyoung, min hyoung, hwang byoung
yihan guan » yan guan
yang guang » yan guan, yang liang
yang yang » wang yang, wang yan
tan yang » dan yang, tan ying, tan yong
dang » dan, lang, wang
hai » hadi, haji, hari

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: wing hyoung ((yihan guan) OR (yang guang)) ((tan yang) OR (yang yang)) duc dang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wing hyoung ((yihan guan) or (yang guang)) ((tan yang) or (yang yang)) duc dang hai ;*.