Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
hanh ban » thanh ban, hanh san, hanh han
hang ban » hang luan, hang va, hang tai
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van
chuc » thuc, chu, chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (chuc nang)) - ((hanh ban) OR (hang ban)) cua thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chuc nang)) - ((hanh ban) OR (hang ban)) cua thong cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chuc nang)) - ((hanh ban) OR (hang ban)) cua thong cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chuc nang)) - ((hanh ban) OR (hang ban)) cua thong cong dan van ban*.