Perhaps you should try some spelling variations:
yang guang » yang yang, yang liang
yan guan » gan guan, yan yuan, yihan guan
tan yang » dan yang, tan yong, tao yang
tan ying » fan ying, ran ying, tan yong
duc phan » duc phung, duc tran, dan phan
phan hai » pham thai, khan hadi, shang hai
wang » wing, wan, lang

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 ((yan guan) or (yang guang)) ((tan yang) OR (tan ying)) duc phan hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hyoung ((yan guan) OR (yang guang)) ((tan yang) OR (tan ying)) duc phan hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((yan guan) or (yang guang)) ((tan yang) OR (tan ying)) duc phan hai ;*".