Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh hai » thanh hai, nhanh hai, hang hai
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu van
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua te » cua tu

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