Perhaps you should try some spelling variations:
sang tao » hang tai
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, mang may
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau

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 ty ((sang ma) OR (sang tao)) hoi. hieu va cac xuc ((va hanh) or (va dan)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((sang ma) OR (sang tao)) hoi. hieu va cac xuc ((va hanh) OR (va dan)) dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((sang ma) OR (sang tao)) hoi. hieu va cac xuc ((va hanh) or (va dan)) dai cua tre*".