Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
dinh cuu » dinh chi
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hieu ve » hieu van
ky tang » ky nang, ky dang, kho tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang van hoa. ((hieu ve) or (hieu va)) cam ((duc ban) OR (dua ban)) hanh dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang van hoa. ((hieu ve) OR (hieu va)) cam ((duc ban) OR (dua ban)) hanh dinh cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang van hoa. ((hieu ve) or (hieu va)) cam ((duc ban) OR (dua ban)) hanh dinh cuu tre*".