Perhaps you should try some spelling variations:
thanh duong » thanh huong, thanh cuong, thanh vuong
thanh dung » thanh tung, thanh hung, hanh dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
va phuong » va thuong, cac phuong
duong van » luong va, dang van, trong van
doc hieu » toc thieu, hoc thieu, hoc hien
duong va » dung va, luong va, dong va
toan cao » toan ban, toan tap

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: doc hieu manh - ((thanh dung) OR (thanh duong)) va phuong ((duong van) OR (duong va)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - ((thanh dung) or (thanh duong)) va phuong ((duong van) OR (duong va)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((thanh dung) or (thanh duong)) va phuong ((duong van) OR (duong va)) toan cao*.