Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
chua dung » chua dong, thuat dung, chua nhung
cua nhung » va nhung
ho thiet » hoc thiet, hoa thiet, so thiet
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho thiet tach - canh tranh ((chua dung) or (cua nhung)) cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - canh tranh ((chua dung) OR (cua nhung)) cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - canh tranh ((chua dung) or (cua nhung)) cong tan toan ban*.