Perhaps you should try some spelling variations:
nhanh vai » nhanh va, nhanh vi, nhanh hai
day nhanh » day thanh, duy nhanh, dac nhan
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hoa doi » hoa dai, hoc doi, xoa doi
hoa hoi » khoa hoi, hoa hoc, hoc hoi
ky lang » ky nang, ky dang, ky tang
va nam » van nam, ha nam, va nay

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 ((hoa hoi) OR (hoa doi)). hieu va nam thuc day nhanh vai ((cua vat) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ((hoa hoi) OR (hoa doi)). hieu va nam thuc day nhanh vai ((cua vat) OR (hoa viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang ((hoa hoi) OR (hoa doi)). hieu va nam thuc day nhanh vai ((cua vat) or (hoa viet))*".