Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
tang van » dang van, hoang van, trong van
sach tu » sach thu, cach tu, sach ty
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo

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 y) or (sach tu)) ((tang van) or (lang xa)) hoi. hieu qua cam duc ban thanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach tu)) ((tang van) OR (lang xa)) hoi. hieu qua cam duc ban thanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach tu)) ((tang van) or (lang xa)) hoi. hieu qua cam duc ban thanh tai cuu tre*.