Perhaps you should try some spelling variations:
nay thuc » nam thuc, cay thuc, day thuc
cau treo » cau theo, cau tren, cau triet
hoc sac » hoc sach, hoc cac, hoc mac
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
vai cau » va cau, van cau, vai cac
sac ky » cac ky, sai ky
va nay » va ngay, va cay
va dan » ca dan, va dao, va dap
va dau » va dao

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

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