Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham tuc » tham thuc, thai tuc, nham thuc
va danh » va dinh, va dan, dia danh
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, ban hanh
nang xa » lang xa, nang ma, mang xa
hai cua » thai cua, dai cua, hoi 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 tham tuc ((va danh) or (va hanh)) hai 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 tham tuc ((va danh) OR (va hanh)) hai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y ((nang xa) or (nang x)) hoi. lieu va tham tuc ((va danh) or (va hanh)) hai cua tre*.