Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
nguoi dan » nguoi dao, nguoi san, nguong dan
kho tang » cao tang
dan toan » van toan, dan than, manh toan
toan tap » toan ban
ha tang » phap tang, cao tang, ha giang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) or (chieu xanh)) - canh tranh ((ha tang) OR (kho tang)) nguoi dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu xanh)) - canh tranh ((ha tang) OR (kho tang)) nguoi dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu xanh)) - canh tranh ((ha tang) OR (kho tang)) nguoi dan toan tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu xanh)) - canh tranh ((ha tang) OR (kho tang)) nguoi dan toan tap*.