Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
trang va » tran van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, 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 chieu xanh - hanh ((trang va) or (hang va)) dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trang va) OR (hang va)) dung cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trang va) or (hang va)) dung cong dan toan ban*.