Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
luan hung » luan chung, luan ung, tuan hung
anh bang » anh hoang, anh quang, tinh bang
lan hung » van hung, luan chung, lan phuong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 ((hieu manh) OR (chieu xanh)) - anh bang ((luan hung) OR (lan hung)) cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (chieu xanh)) - anh bang ((luan hung) or (lan hung)) cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (chieu xanh)) - anh bang ((luan hung) or (lan hung)) cong tan toan cao*.