Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu bang » thu ban, thu hang, thu trang
hanh vai » hanh vi, hanh va, hanh tai
chu bang » chuc nang, chu quang, chu trang
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam loc » cam lo
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
loc va » hoc va, luc va
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((thu bang) or (chu bang)) ((x hoi) OR (o hoi)). lieu va cam loc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((thu bang) OR (chu bang)) ((x hoi) OR (o hoi)). lieu va cam loc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((thu bang) or (chu bang)) ((x hoi) OR (o hoi)). lieu va cam loc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((thu bang) or (chu bang)) ((x hoi) OR (o hoi)). lieu va cam loc va hanh vai cua tre*.