Perhaps you should try some spelling variations:
vat dung » van dung, va dung, viet dung
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
tuc vat » thuc vat, tuc va, tuc hat
cuu tre » cua tre, cau tren, cau treo
van hoc » van hoa
ky dang » ky danh
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

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 ((ky dang) OR (ky nang)) van hoc. hieu ((va cam) or (va cao)) tuc vat dung tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) van hoc. hieu ((va cam) OR (va cao)) tuc vat dung tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) OR (ky nang)) van hoc. hieu ((va cam) or (va cao)) tuc vat dung tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) OR (ky nang)) van hoc. hieu ((va cam) or (va cao)) tuc vat dung tai cuu tre*.