Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
day dau » day du, day sau, dan dau
sach ky » sac ky, sach ty, sach kem
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
lang xa » lang ha, dang xay, lang van
dau va » dau ve, lau va
va cuu » va cau, va chu, va huu

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 ky) or (sach y)) lang xa hoi. ((hieu va) or (lieu va)) nam thuc day dau va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach y)) lang xa hoi. ((hieu va) OR (lieu va)) nam thuc day dau va cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach y)) lang xa hoi. ((hieu va) or (lieu va)) nam thuc day dau va cuu tre*.