Perhaps you should try some spelling variations:
lam thuc » lam thuoc, am thuc, nam thuc
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
va lam » van lam, va lap
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » di 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 ha hoi. hieu va lam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ha hoi. hieu va lam thuc ((va hanh) OR (va thanh)) ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang ha hoi. hieu va lam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang ha hoi. hieu va lam thuc ((va hanh) or (va thanh)) ((vi cua) OR (vai cua)) tre*.