Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hai, thanh loi
thanh hoa » thanh pho
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
phap tu » pham tu
hieu ve » hieu va, hieu van
lanh xa » lang xa, lanh va, canh xa
ty lanh » ty anh, ly lanh, tu lanh

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 lanh xa hoi. hieu ve ((phap tu) or (phan tu)) dang ((thanh hoi) OR (thanh hoa)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty lanh xa hoi. hieu ve ((phap tu) OR (phan tu)) dang ((thanh hoi) OR (thanh hoa)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty lanh xa hoi. hieu ve ((phap tu) or (phan tu)) dang ((thanh hoi) OR (thanh hoa)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty lanh xa hoi. hieu ve ((phap tu) or (phan tu)) dang ((thanh hoi) OR (thanh hoa)) cua tre*.