Perhaps you should try some spelling variations:
trinh mach » tinh mach, trinh minh, trinh may
trinh lich » trinh kinh
hoc thien » hoc hien, hoc thieu, hoc thiet
thien anh » thien danh, tien anh, thien thanh
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 thien anh - hanh ((trinh mach) or (trinh lich)) canh cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien anh - hanh ((trinh mach) OR (trinh lich)) canh cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thien anh - hanh ((trinh mach) or (trinh lich)) canh cong dan toan cao*.