Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
hai cuu » hai cua, hai chu, hai cuc
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi

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