Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, nang cao
van hoc » van hoa
hoc tuc » hoc thuc, hoc truc, hoc tu
xa danh » va danh, dia danh, nam danh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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) OR (co sach)) y ((nang x) OR (nang ma)) hoi. hieu van hoc tuc xa danh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) y ((nang x) or (nang ma)) hoi. hieu van hoc tuc xa danh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) y ((nang x) or (nang ma)) hoi. hieu van hoc tuc xa danh vi cua tre*.