Perhaps you should try some spelling variations:
toc xach » toc sach, tuoc xanh, hoc sach
nam thuc » nam thuoc, am thuc, nam thu
xach tay » canh tay
vat cuu » vat cua
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
lang ha » long ha
lang xa » dang xay, lang van
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 tay ((lang xa) or (lang ha)) hoi. hieu va nam thuc ((va dan) OR (va dao)) vat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc xach tay ((lang xa) OR (lang ha)) hoi. hieu va nam thuc ((va dan) OR (va dao)) vat cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc xach tay ((lang xa) or (lang ha)) hoi. hieu va nam thuc ((va dan) OR (va dao)) vat cuu tre*".