Perhaps you should try some spelling variations:
trinh mach » tinh mach, trinh minh, trinh may
trinh lich » trinh kinh
hoc thien » hoc hien, hoc thiet, hoc tien
hoc thieu » toc thieu, hoc hien
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) OR (hoc thieu)) 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) OR (hoc thieu)) anh - hanh ((trinh mach) OR (trinh lich)) canh cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thien) OR (hoc thieu)) anh - hanh ((trinh mach) or (trinh lich)) canh cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc thien) OR (hoc thieu)) anh - hanh ((trinh mach) or (trinh lich)) canh cong dan toan cao*.