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
trang cua » tranh cua, tang cua, trung cua
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
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 thiet tach - hanh trang cua dang ((cong tan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh trang cua dang ((cong tan) OR (huong dan)) toan cao*.