Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh luan » trinh quan, trinh han, trinh toan
dong manh » duong manh, dong anh, dong danh
dang manh » dang hanh, dang minh, duong manh
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban
luat » xuat

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 - hanh ((trinh luan) OR (trinh luat)) thuong ((dong manh) or (dang manh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh luan) OR (trinh luat)) thuong ((dong manh) OR (dang manh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh luan) OR (trinh luat)) thuong ((dong manh) or (dang manh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh luan) OR (trinh luat)) thuong ((dong manh) or (dang manh)) toan tap*.