Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
xa danh » va danh, dia danh, nam danh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang ma hoa. hieu va cac tuc ((xa danh) or (gia dinh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang ma hoa. hieu va cac tuc ((xa danh) OR (gia dinh)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ma hoa. hieu va cac tuc ((xa danh) or (gia dinh)) doi cua tre*.