Perhaps you should try some spelling variations:
ban hanh » ban hang
cay phoi » cap phoi, tay hoi, cay cho
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
ban anh » ban banh, ban danh, bang anh
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
ky danh » ky anh
ky dang » ky nang
ve cam » ve cham, ve cac, va cam

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 dang) OR (ky danh)) cay phoi. hieu ve cam duc ((ban anh) or (ban hanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky danh)) cay phoi. hieu ve cam duc ((ban anh) OR (ban hanh)) hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) OR (ky danh)) cay phoi. hieu ve cam duc ((ban anh) or (ban hanh)) hai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) OR (ky danh)) cay phoi. hieu ve cam duc ((ban anh) or (ban hanh)) hai cua tre*.