Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh vai » hanh va, hanh tai, hanh van
cham lao » chai lao, cham lai, cham vao
nang noi » nang doc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
nang co » nang cao, nang doc, nang hoc
cua tre » cua te, cuu tre, cua triet
lao va » tao va, cao va, bao va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y ((nang co) or (nang noi)) hoi. hieu ve cham lao va ((hanh vai) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y ((nang co) OR (nang noi)) hoi. hieu ve cham lao va ((hanh vai) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y ((nang co) or (nang noi)) hoi. hieu ve cham lao va ((hanh vai) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y ((nang co) or (nang noi)) hoi. hieu ve cham lao va ((hanh vai) OR (hanh vi)) cua tre*.