Perhaps you should try some spelling variations:
yihan guan » yan guan
yang guang » yang yang, yan guan, yang liang
ran ying » fan ying, jin ying, gao ying
tan ying » fan ying, tan yang, tan yong
wang » wing, wan, lang
hyoung » young, hyong, kyoung
dang » dan, lang, dans
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang hyoung ((yihan guan) or (yang guang)) ((ran ying) OR (tan ying)) duc dang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hyoung ((yihan guan) OR (yang guang)) ((ran ying) OR (tan ying)) duc dang hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((yihan guan) or (yang guang)) ((ran ying) OR (tan ying)) duc dang hai ;*".