Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh tung » thanh tung, manh tung, hanh dung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
cong dan » cong san, cong tan, cong dong
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - ((hanh tung) or (hanh mang)) cua nhung ((cong dan) or (huong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - ((hanh tung) OR (hanh mang)) cua nhung ((cong dan) OR (huong dan)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((hanh tung) or (hanh mang)) cua nhung ((cong dan) or (huong dan)) toan tap*.