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
nang ra » nang ma, lang ra, nang ro
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
ban anh » ban banh, ban danh, bang anh
cuu tre » cua tre, cau tren, cau treo
ra hai » tra hai, ta hai, va hai
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 ra hai. hieu qua cac 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 ra hai. hieu qua cac xuc ((ban anh) OR (ban hanh)) di cuu tre*.