Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
tang van » dang van, hoang van, trong van
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
tang ma » mang may
hai cuu » hai cua, hai chu, hai cuc
hieu ve » hieu van
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky ((tang ma) OR (tang van)) hoi. ((hieu ve) or (hieu va)) cam duc ban thanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky ((tang ma) OR (tang van)) hoi. ((hieu ve) OR (hieu va)) cam duc ban thanh hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky ((tang ma) OR (tang van)) hoi. ((hieu ve) or (hieu va)) cam duc ban thanh hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: su cac ky ((tang ma) OR (tang van)) hoi. ((hieu ve) or (hieu va)) cam duc ban thanh hai cuu tre*.