Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
cuu tre » cau tren, cau treo
duc ban » duc tan, duc van, dua ban
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cua tre » cua te, cua triet, dua tren
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
hieu 2 » hieu n2, hieu _, hieu y
hieu v » hieu va, hieu ve, hieu _

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang xa hoi. ((hieu v) OR (hieu 2)) pham duc ban thanh hai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. ((hieu v) OR (hieu 2)) pham duc ban thanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. ((hieu v) OR (hieu 2)) pham duc ban thanh hai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. ((hieu v) OR (hieu 2)) pham duc ban thanh hai ((cua tre) or (cuu tre))*.