Perhaps you should try some spelling variations:
ban banh » ban hanh, ban danh, ban thanh
tu sach » thu sach, su sach, te sach
ban anh » ban hanh, ban danh, bang anh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ma hoi » xa hoi, ma hoa, me hoi
di cua » dai cua, doi cua, de 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 ((ma hoi) or (mai hoi)). hieu ve cam xuc ((ban anh) or (ban banh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (mai hoi)). hieu ve cam xuc ((ban anh) OR (ban banh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (mai hoi)). hieu ve cam xuc ((ban anh) or (ban banh)) di cua tre*.