Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - hanh ((tang xa) OR (tang ma)) truong ((cong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((tang xa) OR (tang ma)) truong ((cong dan) OR (cong san)) toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((tang xa) OR (tang ma)) truong ((cong dan) or (cong san)) toan ban*".