Perhaps you should try some spelling variations:
sach thanh » sach tranh, sach tham, danh thanh
thanh tra » thanh toan, thanh hoa
can tranh » canh tranh, tan tran, van ranh
tranh tai » tranh thai, trinh tai, thanh tai
toc hanh » hoc hanh, doc hanh, tuc hanh
tu sach » thu sach, su sach, te sach
tu can » tu ban, tu cac, thu canh

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 thanh tra ) or ( toc hanh chinh tri ))) or ( tu can tranh tai ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( tu sach thanh tra ) OR ( toc hanh chinh tri ))) OR ( tu can tranh tai )).
• Adding a wildcard symbol may retrieve word variants: (((( tu sach thanh tra ) or ( toc hanh chinh tri ))) or ( tu can tranh tai ))*.