Perhaps you should try some spelling variations:
ban hanh » ban hang
cau treo » cau theo, cau tren, cau triet
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
hieu v » hieu va, hieu ve, hieu 2
v pham » vi pham, d pham

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) or (sach y)) lang xa hoi. hieu v pham duc ban hanh vi ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach y)) lang xa hoi. hieu v pham duc ban hanh vi ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sach y)) lang xa hoi. hieu v pham duc ban hanh vi ((cua tre) or (cau treo))*.