Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
anh sang » lanh sang, anh bang, anh nang
anh dang » anh dong, anh dung, anh bang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
va dung » van dung, va duong, vat dung

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 sang) or (anh dang)) va dung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - ((anh sang) OR (anh dang)) va dung cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - ((anh sang) or (anh dang)) va dung cong dan toan tap*.