Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
luan nang » luan van, luan san
van thanh » ban thanh, van tuan
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 van » song van, nong dan, nong san

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chinh sach)) - anh dung ((luan nang) or (van nang)) nong van thanh mau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - anh dung ((luan nang) OR (van nang)) nong van thanh mau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - anh dung ((luan nang) or (van nang)) nong van thanh mau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chinh sach)) - anh dung ((luan nang) or (van nang)) nong van thanh mau*.