Perhaps you should try some spelling variations:
yang guang » yan guan, yang liang
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
sang minh » kang minah, anh minh, song min
minh hong » minh cong, min hong, linh hoang
sin sang » shin sang, sin sdn, kil sang
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((wang yang) or (((yang guang) or (yang yang)))) hui sin sang minh hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((wang yang) OR (((yang guang) OR (yang yang)))) hui sin sang minh hong yu ;.
• Adding a wildcard symbol may retrieve word variants: wang ((wang yang) or (((yang guang) or (yang yang)))) hui sin sang minh hong yu ;*.