Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
lam thuc » lam thuoc, am thuc, nam thuc
hieu van » hieu va, thien van, lieu va
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
day dan » day danh, dao dan, cay dan
van lam » van nam
cuu tre » cua tre, cau tren, cau treo
sach ty » sach tu, sach thu, xach tay
lang ha » long ha
lang xa » dang xay, lang van

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 ty) or (sach y)) ((lang xa) OR (lang ha)) hoi. hieu van lam thuc day dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach y)) ((lang xa) OR (lang ha)) hoi. hieu van lam thuc day dan vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach y)) ((lang xa) OR (lang ha)) hoi. hieu van lam thuc day dan vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach y)) ((lang xa) OR (lang ha)) hoi. hieu van lam thuc day dan vai cuu tre*.