Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
va duong » van duong, va tuong, va dong
va huong » va thuong, va phuong, va tuong
cong van » cong vang, song van, cong tan
cong san » cong tac
tai tap » bai tap, tai tao, hai tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - canh tranh ((va duong) or (va huong)) ((cong van) OR (cong san)) tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh tranh ((va duong) OR (va huong)) ((cong van) OR (cong san)) tai tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh tranh ((va duong) or (va huong)) ((cong van) OR (cong san)) tai tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh ((va duong) or (va huong)) ((cong van) OR (cong san)) tai tap*.