Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
lang tuong » lang trong, bang tuong, lang muong
cong chuc » cong thuc, cong cu, cong cua
chuc lang » chuc nang, chuc cong, chi lang
tuong dan » huong dan, tung dan, xuong dan
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 tuong 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 tuong dan van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chieu sach)) - thanh cong chuc lang tuong dan van ban*.