Perhaps you should try some spelling variations:
toc xach » tuoc xanh, hoc sach, doc sach
nam thuc » nam thuoc, am thuc, nam thu
toc sach » hoc sach, doc sach, thuoc sach
tay dang » tay dong, tay dung, tay lang
dang xay » dang van, van xay
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
va dan » ca dan, va dau, va dap
va dao » ca dao
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc xach) or (toc sach)) tay dang xay hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc xach) OR (toc sach)) tay dang xay hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc xach) or (toc sach)) tay dang xay hoi. hieu va nam thuc ((va dan) OR (va dao)) vai cuu tre*".