Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
nam duoc » nam thuoc, da duoc, dat duoc
duoc ban » duc ban, quoc ban, buoc ban
sach ky » sach y, sach kem, sach hay
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
x hoi » xa hoi, o hoi, x ho

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 ky) or (sach ty))) or (sac ky)) nang x hoi. lieu va nam duoc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach ty))) OR (sac ky)) nang x hoi. lieu va nam duoc ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) or (sach ty))) or (sac ky)) nang x hoi. lieu va nam duoc ban thanh dai cua tre*.