Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thai tuc » thai thuc, thai thuy, thai hoc
danh sai » dung sai, danh bat, danh dau
nang xa » lang xa, nang ma, mang xa
va thai » van thai, va tai, va tham
xa danh » va danh, dia danh, nam danh
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 ((nang xa) or (nang x)) hoi. lieu va thai tuc xa danh sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((nang xa) OR (nang x)) hoi. lieu va thai tuc xa danh sai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y ((nang xa) or (nang x)) hoi. lieu va thai tuc xa danh sai cua tre*.