Perhaps you should try some spelling variations:
lam thuc » lam thuoc, am thuc, nam thuc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
va lam » van lam, va lap
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu va lam thuc va hanh ((((vi cua) OR (vai cua))) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu va lam thuc va hanh ((((vi cua) OR (vai cua))) OR (di cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu va lam thuc va hanh ((((vi cua) OR (vai cua))) or (di cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va lam thuc va hanh ((((vi cua) OR (vai cua))) or (di cua)) tre*.