Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » hanh trinh, canh tinh, anh trinh
hoc thieu » toc thieu, hoc hien
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
van thanh » ban thanh, van tuan
van toan » van tuan, van tan, manh toan

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 xanh - ((canh trinh) OR (canh tranh)) quan hang cong ((van toan) OR (van thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((canh trinh) or (canh tranh)) quan hang cong ((van toan) OR (van thanh)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh trinh) or (canh tranh)) quan hang cong ((van toan) OR (van thanh)) cau*.