Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
van lam » van nam
mua ban » cua ban
qua ban » cua ban, qua quan

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 nang ma hoa. hieu van lam ((mua ban) or (qua ban)) thanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoa. hieu van lam ((mua ban) OR (qua ban)) thanh lai chau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu van lam ((mua ban) or (qua ban)) thanh lai chau tre*.