Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
long muong » lang muong, long vuong, mong muong
nang quan » ban quan, nang suat
quan long » quan lang, quan dong, quan hoang
muong dan » huong dan, muong van, tuong dan
anh nang » ganh nang, anh bang, anh dang
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((chieu sach) or (chiet tach)) - anh nang quan long muong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - anh nang quan long muong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - anh nang quan long muong dan toan tap*.