Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh hoi » hanh thoi, hanh noi, hanh hoa
cuu tre » cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cua tre » cua te, cua triet, dua tren
cam duc » cam xuc, cao duc, nam duoc
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu ve ((cam duc) OR (pham duc)) ban hanh hoi ((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 ve ((cam duc) OR (pham duc)) ban hanh hoi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu ve ((cam duc) OR (pham duc)) ban hanh hoi ((cua tre) or (cuu tre))*.