Perhaps you should try some spelling variations:
toc xach » tuoc xanh, hoc sach, doc sach
toc sach » hoc sach, doc sach, thuoc sach
dang xay » van xay
dang van » hoang van, hang va
nam thuc » nam thuoc, am thuc, nam thu
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam, va nay
va dan » ca dan, va dao, va dau

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