Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong dang » cong dong, cong dan, cong dung
dang toan » dang tran, dan toan, dung toan
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
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 trang ((cua dung) or (cua dong)) cong dang toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh trang ((cua dung) OR (cua dong)) cong dang toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh trang ((cua dung) or (cua dong)) cong dang toan tap*.