Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
nhanh di » nhanh vi, nhanh li, nhanh dien
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
ve cam » ve cham, ve cac, va cam
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) or (ky nang)) x hoi. hieu ve cam thuc day nhanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) x hoi. hieu ve cam thuc day nhanh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (ky nang)) x hoi. hieu ve cam thuc day nhanh di cuu tre*.