Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
su sach » vu sach
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
v nang » va nang, vu nang, van nang
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho
ve am » va am
thuc » thu

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) OR (so sach)) v nang x hoi. hieu ve am thuc vat hanh di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) v nang x hoi. hieu ve am thuc vat hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) v nang x hoi. hieu ve am thuc vat hanh di cuu tre*.