Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
canh ban » can ban, canh van, doanh ban
canh dan » canh van, sanh dan, thanh dan
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((canh ban) OR (canh dan)) cua dang cong van toan tap~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((canh ban) OR (canh dan)) cua dang cong van toan tap*.