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 huong, va dong
va tuong » va thuong, va thong, xa truong
cong van » cong vang, cong san, song van
tai tap » bai tap, tai tao, lai tap
hai tap » hai thap, bai tap, han 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 tuong)) cong van ((tai tap) or (hai tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh tranh ((va duong) OR (va tuong)) cong van ((tai tap) OR (hai tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh tranh ((va duong) OR (va tuong)) cong van ((tai tap) or (hai tap))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh ((va duong) OR (va tuong)) cong van ((tai tap) or (hai tap))*.