Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh mach » trinh lich, trinh minh, trinh may
hoc chieu » hoc thieu, ho chieu, hoc hien
tinh mach » tinh cach, tim mach, tinh bac
canh cong » hanh cong, anh cong, canh cung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 ((trinh mach) or (tinh mach)) canh cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trinh mach) OR (tinh mach)) canh cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trinh mach) or (tinh mach)) canh cong dan toan cao*.