Perhaps you should try some spelling variations:
sach thanh » sach tham, danh thanh, sach danh
sach tranh » canh tranh
tranh tri » trang tri, thanh tri, tran tri
thanh tra » thanh toan, thanh hoa
dung sai » dung tai, dung va, dung dat
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach dung sai ) or ((( toc sach tranh tri ) or ( toc sach thanh tra ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dung sai ) OR ((( toc sach tranh tri ) OR ( toc sach thanh tra )))).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dung sai ) or ((( toc sach tranh tri ) or ( toc sach thanh tra ))))*.