Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
canh doanh » hanh doanh, chinh doanh, doanh doanh
thu canh » thuc hanh, thu cong, thu ban
ta thanh » tai thanh, va thanh, ha thanh
trinh ly » trinh ky, trinh do, trinh tu
va khi » va chi, va ki
va kha » va khao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu canh doanh ((va khi) OR (va kha)) đong luc ) or ( ta thanh trinh ly chi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh doanh ((va khi) OR (va kha)) đong luc ) OR ( ta thanh trinh ly chi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu canh doanh ((va khi) OR (va kha)) đong luc ) or ( ta thanh trinh ly chi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu canh doanh ((va khi) OR (va kha)) đong luc ) or ( ta thanh trinh ly chi đong luc ))*.