Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
ban nhanh » ban hanh, ban thanh, ban nhan
thai cua » than cua, tai cuc, tri cua
nang noi » nang doc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cac duc » cao duc, cac dac, cac nuoc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang co » nang cao, nang doc, nang hoc

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 ky ((nang co) or (nang noi)) hoc. hieu ve ((cac duc) OR (cac du)) ban nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang co) OR (nang noi)) hoc. hieu ve ((cac duc) OR (cac du)) ban nhanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang co) or (nang noi)) hoc. hieu ve ((cac duc) OR (cac du)) ban nhanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang co) or (nang noi)) hoc. hieu ve ((cac duc) OR (cac du)) ban nhanh thai cua tre*.