Perhaps you should try some spelling variations:
vat nhanh » vat thanh, phat nhanh, hat nhan
toc sach » hoc sach, doc sach, thuoc sach
kho tang » cao tang
cau thuc » cau truc, cuu thuc, can thuc
nhanh ha » thanh hoa, thanh hai, khanh hoa
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va dau
ha cua » hoa cua, hai cua, nha cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (toc sach)) kho tang ma hoi. hieu va cau thuc vat nhanh ha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) kho tang ma hoi. hieu va cau thuc vat nhanh ha cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) kho tang ma hoi. hieu va cau thuc vat nhanh ha cua tre*.