Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh han
hoc chieu » hoc thieu, ho chieu, hoc hien
cong van » cong vang, cong san, cong tan
song van » hoang van, trong van, duong van
tan tap » toan tap, han tap, tan tat
luat » luan, xuat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((trinh luat) or (trinh quan)) tong ((cong van) OR (song van)) tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh luat) OR (trinh quan)) tong ((cong van) OR (song van)) tan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trinh luat) or (trinh quan)) tong ((cong van) OR (song van)) tan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh luat) or (trinh quan)) tong ((cong van) OR (song van)) tan tap*.