Perhaps you should try some spelling variations:
duong van » duong anh
wang yang » wang yan, wang liang, wang yanling
wan wang » wen wang, yan wang, qian wang
xi irene » _ irene, i rene, ii rene
tang min » chang min, sang minh, yang mind
yang jin » yang jie, yang jun, ying jin
long han » long chain, long thanh, long haul
cong van » congo can, cong sun
yang xi » yang di, yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan wang yang xi irene ((tang min) or (yang jin)) ((long han) or (((cong van) OR (duong van)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan wang yang xi irene ((tang min) OR (yang jin)) ((long han) OR (((cong van) OR (duong van)))) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan wang yang xi irene ((tang min) or (yang jin)) ((long han) or (((cong van) OR (duong van)))) ;".
• Adding a wildcard symbol may retrieve word variants: wan wang yang xi irene ((tang min) or (yang jin)) ((long han) or (((cong van) OR (duong van)))) ;*.