Perhaps you should try some spelling variations:
ban hanh » ban hang
ban lanh » ban linh, ban anh, ban banh
dang van » hoang van, hang va
van phoi » van hoi, van choi, van khoi
tu sach » thu sach, su sach, te sach
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
ky dang » ky nang, ky danh
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet

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) or (so sach)) ky dang van phoi. hieu ve pham duc ((ban lanh) or (ban hanh)) hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ky dang van phoi. hieu ve pham duc ((ban lanh) OR (ban hanh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ky dang van phoi. hieu ve pham duc ((ban lanh) or (ban hanh)) hai cua tre*.