Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » trinh luat, trinh han
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh ((trinh quan) OR (tinh quang)) tong cong tan ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh ((trinh quan) OR (tinh quang)) tong cong tan ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh ((trinh quan) OR (tinh quang)) tong cong tan ((toan cao) or (toan tap))*.