Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
lam thuoc » nam thuoc, am thuc, cay thuoc
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
thuoc ma » hoc ma, duoc ma
ma thanh » mai thanh, va thanh, ha thanh
gian cua » gian xu, ban cua
sach ty » sach y, sach tu, xach tay
lang xa » lang ha, dang xay, lang van
van lam » van nam
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van lam thuoc ma thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thu)) lang xa hoi. hieu van lam thuoc ma thanh gian cua tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thu)) lang xa hoi. hieu van lam thuoc ma thanh gian cua tre*.