Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
danh trung » dang trung, dinh trung, thanh trung
manh trung » manh tung, thanh trung, manh hung
hoc chieu » hoc thieu, ho chieu, hoc hien
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan tap » toan ban

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 chieu xanh - ((danh trung) OR (manh trung)) va nhung ((cong tan) OR (cong tac)) toan tap~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((danh trung) or (manh trung)) va nhung ((cong tan) or (cong tac)) toan tap*.