Perhaps you should try some spelling variations:
dang wang » wang yang, dang hung, hong wang
chang won » chang soon, chang ann, chang min
dang anh » duong anh
yong hua » dong hua, ying hua, wang hua
hua rene » hua ren, juan rene
yang lin » yang jin, wang lin, yang li
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: ((dang wang) OR (dang anh)) yong hua rene ((chang won) or (yang lin)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dang wang) OR (dang anh)) yong hua rene ((chang won) OR (yang lin)) hong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dang wang) OR (dang anh)) yong hua rene ((chang won) or (yang lin)) hong yu ;*".