Perhaps you should try some spelling variations:
duong van » duong anh
than our » than your, than one, than you
cong sun » cong shu, wing sun
cong van » congo can
our way » your way
way yan » way dan, way land
yan jiu » yang jie, yang jin, pang jiu
wang » wing, wan, lang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yanling than our way yan jiu ((cong sun) OR (((cong van) OR (duong van)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yanling than our way yan jiu ((cong sun) or (((cong van) OR (duong van)))) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yanling than our way yan jiu ((cong sun) or (((cong van) OR (duong van)))) ;*.