Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
anh tang » anh bang, anh dang, anh nang
cua bang » chua bang, cua dang, cua hang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 manh) or (chieu sang)) - anh tang ((cua bang) OR (cua ban)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - anh tang ((cua bang) OR (cua ban)) cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sang)) - anh tang ((cua bang) OR (cua ban)) cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - anh tang ((cua bang) OR (cua ban)) cong san toan ban*.