Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
nay thuc » nam thuc, cay thuc, day thuc
cau treo » cau theo, cau tren, cau triet
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dao vai » dao van, dao va, dao bai
vai cau » va cau, van cau, vai cac
va nay » va ngay, va cay
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) ky dang xa hoi. hieu va nay thuc va dao vai cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky dang xa hoi. hieu va nay thuc va dao vai cau treo".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ky dang xa hoi. hieu va nay thuc va dao vai cau treo*.