Perhaps you should try some spelling variations:
sang tao » hang tai
chat duc » chat xuc, chat doc, chet duoc
te sach » toc sach
va chat » van chat, va phat, cao chat
hai cua » thai cua, dai cua, hoi cua
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
sang ma » tang ma, nang ma, mang may
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: te sach ly ((sang ma) OR (sang tao)) hoi. hieu va chat duc ((va hanh) or (va danh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly ((sang ma) OR (sang tao)) hoi. hieu va chat duc ((va hanh) OR (va danh)) hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly ((sang ma) OR (sang tao)) hoi. hieu va chat duc ((va hanh) or (va danh)) hai cua tre*".