Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
van duong » van dong, van dung, van phong
ho chieu » theo chieu, hoc thieu, doi chieu
va huong » va thuong, va phuong, va tuong
cong van » cong vang, cong san, song van
van tai » von tai, van tuan
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 ((van duong) or (va huong)) cong van tai tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh tranh ((van duong) OR (va huong)) cong van tai tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh ((van duong) or (va huong)) cong van tai tap*.