Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chieu sach » chinh sach, chiet tach, chieu sang
dang cong » dung cong
anh dang » anh dong, anh dung, anh bang
dang cua » dung cua, dong cua, mang cua
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quang) or (chieu sach)) - anh dang cua dang cong van ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (chieu sach)) - anh dang cua dang cong van ((toan ban) OR (van ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quang) or (chieu sach)) - anh dang cua dang cong van ((toan ban) OR (van ban))*".