Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
canh hanh » xanh hanh, danh thanh, ban hanh
dang cong » dung cong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
doi chi » doi khi
va dang » van dang, va nang, va 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: ((hoc thieu) OR (doi chi)) xanh - ((canh hanh) OR (canh tranh)) va dang cong van toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doi chi)) xanh - ((canh hanh) OR (canh tranh)) va dang cong van toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) xanh - ((canh hanh) OR (canh tranh)) va dang cong van toan ban*.