Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh dai » danh dau, danh di, danh sai
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nam duc » nam duoc, pham duc, nam thuc
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ang xa » mang xa, dang xay, hoang xa

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 y ((((ang xa) or (lang xa))) or (nang x)) hoi. hieu van nam duc va danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((((ang xa) OR (lang xa))) OR (nang x)) hoi. hieu van nam duc va danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((((ang xa) or (lang xa))) or (nang x)) hoi. hieu van nam duc va danh dai cua tre*.