Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hieu quang » thieu quang, hieu quan, hieu qua
thong danh » thong dan, thong lanh, thong thanh
trong danh » trong doanh, truong danh, trong anh
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu quang - thanh tuong ((va thong) OR (va phuong)) ((thong danh) OR (trong danh)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quang - thanh tuong ((va thong) or (va phuong)) ((thong danh) OR (trong danh)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - thanh tuong ((va thong) or (va phuong)) ((thong danh) OR (trong danh)) toan ban*.