Perhaps you should try some spelling variations:
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach ty » sach y, sach thu, xach tay
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
sach tu » sach thu, cach tu, sach uu
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho
va am » va lam, va cam

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: te ((sach ty) OR (sach tu)) nang x hoi. hieu va am thuc ((va hanh) OR (va danh)) di cuu tre~.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) nang x hoi. hieu va am thuc ((va hanh) or (va danh)) di cuu tre*.