Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh luan » khanh luan, hang luan, hanh luat
dang cong » dung cong
van dang » van dong, van dung, van nang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 sang) OR (chinh sach)) - hanh luan van dang cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chinh sach)) - hanh luan van dang cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chinh sach)) - hanh luan van dang cong dan toan cao*.