Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
ty hang » ly hang, thi hang, thu hang
van cam » van lam, van cau, van dam
xuc ban » duc ban, cuc ban, quoc ban
vai cua » dai cua, hai cua, lai cua
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 ((ty hang) or (ty xang)) xa hoi. hieu ((van cam) OR (van nam)) xuc ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ty xang)) xa hoi. hieu ((van cam) OR (van nam)) xuc ban thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (ty xang)) xa hoi. hieu ((van cam) OR (van nam)) xuc ban thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ty xang)) xa hoi. hieu ((van cam) OR (van nam)) xuc ban thanh vai cua tre*.