Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trinh quan » tinh quang, trinh han
duong cong » dung cong, luong cong, duong trong
cong tac » cong ty
tac van » tac vang, cac van, tac va
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: doi ((chieu sach) OR (chieu sang)) - hanh ((trinh luat) or (trinh quan)) duong cong tac van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh ((trinh luat) OR (trinh quan)) duong cong tac van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - hanh ((trinh luat) or (trinh quan)) duong cong tac van ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - hanh ((trinh luat) or (trinh quan)) duong cong tac van ban*.