Perhaps you should try some spelling variations:
nhanh tri » nhanh thi, thanh tri, nhanh thai
ban nhanh » ban hanh, ban thanh, ban nhan
nang noi » nang doc
tu sach » thu sach, su sach, te sach
cac duc » cao duc, cac dac, cac nuoc
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang hoc
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: tu sach y ((nang co) or (nang noi)) hoc. hieu ve ((cac duc) or (cac du)) ban nhanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang co) OR (nang noi)) hoc. hieu ve ((cac duc) OR (cac du)) ban nhanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang co) or (nang noi)) hoc. hieu ve ((cac duc) or (cac du)) ban nhanh tri cua tre*.