Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
thanh hoi » thanh hoai, thanh hoa, thanh hai
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
phap tu » pham tu
hoi cua » hoi chuc
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: so sach ty lang xa hoi. hieu ve ((phap tu) or (phan tu)) dang thanh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty lang xa hoi. hieu ve ((phap tu) OR (phan tu)) dang thanh hoi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty lang xa hoi. hieu ve ((phap tu) or (phan tu)) dang thanh hoi cua tre*.