Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
cong chuc » cong thuc, cong cu, cong cua
chuc lang » chuc nang, chuc cong, chi lang
lang tung » lang trung, lang tuong, dang tung
tung dan » dung dan, huong dan, trung dai
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (chieu sach)) - thanh cong chuc lang tung dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - thanh cong chuc lang tung dan van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chieu sach)) - thanh cong chuc lang tung dan van ban*.