Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
cang thang » cong thanh, dang thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
chua dong » ha dong, huy dong, hoa dong
thang ban » hang ban, tang ban, thanh ban
cua dong » cua cong, cua dang, cua nong
ban cau » bang cau, ban can, van cau

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 - canh tranh ((chua dong) or (cua dong)) cang thang ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - canh tranh ((chua dong) OR (cua dong)) cang thang ban cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh tranh ((chua dong) or (cua dong)) cang thang ban cau*.