Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, nhat hanh
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang x hoi. ((hieu va) OR (lieu va)) cam thuc ((vat hanh) OR (va hanh)) di cuu tre~.
• Adding a wildcard symbol may retrieve word variants: so sach v nang x hoi. ((hieu va) or (lieu va)) cam thuc ((vat hanh) or (va hanh)) di cuu tre*.