Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nam xuc » cam xuc, nam xua, nam thuc
cua tre » cua te, cuu tre, cua triet
co hoi » co loi
va nam » van nam, ha nam, va nay
vi cua » vai cua, di cua

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 hoi) OR (co hoc)). lieu va nam xuc ((ban hanh) or (van ban)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((co hoi) OR (co hoc)). lieu va nam xuc ((ban hanh) OR (van ban)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((co hoi) OR (co hoc)). lieu va nam xuc ((ban hanh) or (van ban)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((co hoi) OR (co hoc)). lieu va nam xuc ((ban hanh) or (van ban)) vi cua tre*.