Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
van anh » van thanh, van minh
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
di cua » dai cua, doi cua, de cua
cua te » cua tu
tuan » quan, tran, luan

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 ((y lang) OR (_ lang)) van hoa. hieu vu cham tuc ((van anh) or (tuan anh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y lang) OR (_ lang)) van hoa. hieu vu cham tuc ((van anh) OR (tuan anh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y lang) OR (_ lang)) van hoa. hieu vu cham tuc ((van anh) or (tuan anh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y lang) OR (_ lang)) van hoa. hieu vu cham tuc ((van anh) or (tuan anh)) di cua te*.