Perhaps you should try some spelling variations:
chiet tach » chieu sach
luan nang » luan van, luan san
ban thanh » ban hanh, ban hang
thanh mau » hanh mau, thanh san, thanh hai
anh dung » anh dong, anh huong, sach dung
van nang » van quang, van ban, van dong
nong ban » nong dan, nong san, dong ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chiet tach) or (chinh sach)) - anh dung ((luan nang) or (van nang)) nong ban thanh mau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (chinh sach)) - anh dung ((luan nang) OR (van nang)) nong ban thanh mau.
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (chinh sach)) - anh dung ((luan nang) or (van nang)) nong ban thanh mau*.