Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
phung cong » nhung cong, phong cong, nhung chong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
hung cong » nhung cong, hung cuong, dung cong
dang toan » dang tran, dan toan, dung 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: ho ((chieu sach) OR (chiet tach)) - hanh tang luan ((hung cong) or (phung cong)) dang toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - hanh tang luan ((hung cong) OR (phung cong)) dang toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - hanh tang luan ((hung cong) or (phung cong)) dang toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - hanh tang luan ((hung cong) or (phung cong)) dang toan tap*.