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

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