Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
toc sach » hoc sach, doc sach, thuoc sach
va nhanh » va thanh, va hanh, va nhan
cao duc » dao duc, cao suc, giao duc
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
ve cao » va cao, ve bao, ve cac
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang ((mai hoi) OR (lai hoi)). hieu ve cao duc va nhanh thai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((mai hoi) OR (lai hoi)). hieu ve cao duc va nhanh thai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ((mai hoi) OR (lai hoi)). hieu ve cao duc va nhanh thai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((mai hoi) OR (lai hoi)). hieu ve cao duc va nhanh thai ((cua tre) or (cua te))*.