Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
toc sach » hoc sach, doc sach, thuoc sach
ta thanh » tai thanh, va thanh, ha thanh
ky tang » ky dang, kho tang, ky trong
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
tuc ta » tuc tap, tuc tao, tuc tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky tang) OR (ky nang)) van hoa. hieu ((van lam) or (van nam)) tuc ta thanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky tang) OR (ky nang)) van hoa. hieu ((van lam) OR (van nam)) tuc ta thanh van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky tang) OR (ky nang)) van hoa. hieu ((van lam) or (van nam)) tuc ta thanh van cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky tang) OR (ky nang)) van hoa. hieu ((van lam) or (van nam)) tuc ta thanh van cuu tre*.