Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
duong thanh » dong thanh, muong thanh, luong thanh
chieu sach » chinh sach, chieu sang, chieu xanh
mang quan » tang quan, hang quan, manh quan
nang quan » ban quan, nang suat
thanh van » thanh san, thanh toan, thanh phan

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 (chiet tach)) - hanh ((mang quan) or (nang quan)) nhung duong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh ((mang quan) OR (nang quan)) nhung duong thanh van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - hanh ((mang quan) or (nang quan)) nhung duong thanh van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - hanh ((mang quan) or (nang quan)) nhung duong thanh van ban*.