Perhaps you should try some spelling variations:
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
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
vi cau » va cau, ve cau, di cau

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 y ((nang x) OR (sang tao)) hoi. hieu van hoc tuc xa danh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang x) or (sang tao)) hoi. hieu van hoc tuc xa danh vi cau tren*.