Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nay thuc » nam thuc, cay thuc, day thuc
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
va nay » va ngay, va cay
y nang » ky nang, ly nang, v nang
va dau » va dao
va dan » ca dan, va dao, va dap

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 y nang xa hoi. hieu va nay thuc ((va dan) or (va dau)) vai ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang xa hoi. hieu va nay thuc ((va dan) OR (va dau)) vai ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. hieu va nay thuc ((va dan) or (va dau)) vai ((cuu tre) or (cua triet))*.