Perhaps you should try some spelling variations:
sach thanh » sach tranh, sach tham, danh thanh
thanh tra » thanh toan, thanh hoa
toc sach » hoc sach, doc sach, thuoc sach
sach han » sach tham, sach danh, sach nang
han tri » han tai, van tri, thanh tri
te van » le van, ve van, ta van
te va » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((te van) OR (te va)) quan tri ) or ((( toc sach han tri ) or ( toc sach thanh tra ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((te van) OR (te va)) quan tri ) OR ((( toc sach han tri ) OR ( toc sach thanh tra ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((te van) OR (te va)) quan tri ) or ((( toc sach han tri ) or ( toc sach thanh tra ))))*".