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
hieu va » lieu va, hieu qua
ban anh » ban banh, ban danh, bang anh
cuu tre » cua tre, cau tren, cau treo
ro hai » o hai, so hai, do hai
co hai » co dai, co hoi, o hai
va cam » va cham, va cac, va cao
di cuu » di cau, di cua, dinh cuu

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 ((ro hai) OR (co hai)). hieu va cam xuc ((ban anh) or (ban hanh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ro hai) OR (co hai)). hieu va cam xuc ((ban anh) OR (ban hanh)) di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ro hai) OR (co hai)). hieu va cam xuc ((ban anh) or (ban hanh)) di cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ro hai) OR (co hai)). hieu va cam xuc ((ban anh) or (ban hanh)) di cuu tre*.