Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hang tai » hang va, dung tai
cac truc » cau truc, cac tru, cac trung
so sach » so sanh, bo sach, co sach
tai cuu » tai cuc, tai buu, tai cua
va hang » van hang, va nang, va lang
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
ky dang » ky nang, ky danh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (toc sach)) ky dang ((van hoi) OR (van hoc)). lieu va cac truc va hang tai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (toc sach)) ky dang ((van hoi) OR (van hoc)). lieu va cac truc va hang tai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (toc sach)) ky dang ((van hoi) OR (van hoc)). lieu va cac truc va hang tai cuu tre*.