Perhaps you should try some spelling variations:
trinh mach » tinh mach, trinh lich, trinh may
trinh minh » trinh kinh, trinh dinh, trinh sinh
hoc thieu » toc thieu
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) xanh - hanh ((trinh mach) OR (trinh minh)) canh cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (hoc hien)) xanh - hanh ((trinh mach) OR (trinh minh)) canh cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) xanh - hanh ((trinh mach) OR (trinh minh)) canh cong dan toan cao*.