Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
xa thanh » va thanh, ha thanh, ta thanh
dang xay » dang van, van xay
sach ky » sac ky, sach y, sach kem
xay hoi » xa hoi, tay hoi, cay phoi
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cai
va cao » va cac, va co, va dao

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