Perhaps you should try some spelling variations:
thien van » thi van
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
duoc ban » duc ban, quoc ban, buoc ban
lam duoc » nam duoc, luat duoc, lam thuoc
tu sach » thu sach, te sach, tu cach
hai cua » thai cua, dai cua, hoi cua
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

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) OR (su sach)) y lang xa hoi. ((hieu va) or (thien van)) lam duoc ban thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y lang xa hoi. ((hieu va) OR (thien van)) lam duoc ban thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y lang xa hoi. ((hieu va) or (thien van)) lam duoc ban thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y lang xa hoi. ((hieu va) or (thien van)) lam duoc ban thanh hai cua tre*.