Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
hai cua » thai cua, dai cua, hoi cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang xa hoi. ((hieu ve) or (hieu van)) ((nam duoc) or (cam xuc)) ban thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang xa hoi. ((hieu ve) OR (hieu van)) ((nam duoc) OR (cam xuc)) ban thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang xa hoi. ((hieu ve) or (hieu van)) ((nam duoc) or (cam xuc)) ban thanh hai cua tre*.