Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong song » thong cong, thong dong, thong hong
thanh tra » thanh toan, thanh hoa
van thong » van thuong, van phong, va thong
song van » hoang van, trong van, duong van
tra van » tran van, ta van, trang van
van tan » van tuan, van ban, van tai
tan cua » than cua, tang cua, toan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (chiet tach)) - thanh tra van thong song van tan cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chiet tach)) - thanh tra van thong song van tan cua.
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chiet tach)) - thanh tra van thong song van tan cua*.