Perhaps you should try some spelling variations:
sach truc » cach thuc, sach tren, sach thu
truc nang » truc nano, tru nang, truc trang
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
thuc ban » thuoc ban, thuc dan, thu ban
cua tre » cua te, cua triet, dua tren
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
cuu tre » cau tren, cau treo
ve nam » he nam, va nam, le nam
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach truc nang ma hoi. hieu ((ve nam) or (ha nam)) thuc ban thanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach truc nang ma hoi. hieu ((ve nam) OR (ha nam)) thuc ban thanh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach truc nang ma hoi. hieu ((ve nam) or (ha nam)) thuc ban thanh lai ((cua tre) or (cuu tre))*.