Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
xay hanh » day nhanh, day thanh, xanh hanh
thuc xay » thuc day, tuc xay, thuat xay
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
vai cua » dai cua, hai cua, lai cua
hieu va » hieu qua
sach ky » sac ky, sach y, sach ty
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi

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 dang ((ma hoi) or (xa hoi)). ((hieu va) OR (lieu va)) nam thuc xay hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ((ma hoi) OR (xa hoi)). ((hieu va) OR (lieu va)) nam thuc xay hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang ((ma hoi) or (xa hoi)). ((hieu va) OR (lieu va)) nam thuc xay hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ((ma hoi) or (xa hoi)). ((hieu va) OR (lieu va)) nam thuc xay hanh vai cua te*.