Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham duc » pham duc, cham soc, pham duy
hang tai » hang va, dung tai
kho tang » cao tang
cua tre » cua te, cua triet, dua tren
va hang » van hang, va nang, va lang
va cham » va chat, va tham
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, ky trong
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ky tang) OR (kho tang)) van hoi. lieu va cham duc va hang tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky tang) OR (kho tang)) van hoi. lieu va cham duc va hang tai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky tang) OR (kho tang)) van hoi. lieu va cham duc va hang tai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky tang) OR (kho tang)) van hoi. lieu va cham duc va hang tai ((cua tre) or (cuu tre))*.