Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
hang cong » dang cong, hang nong, bang cong
van ranh » van anh, van hanh, van manh
hoc hang » hoc hanh, hoc bang, hoc tang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu xanh)) - ((canh tranh) or (van ranh)) hoc hang cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - ((canh tranh) OR (van ranh)) hoc hang cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - ((canh tranh) or (van ranh)) hoc hang cong san toan ban*.