Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
nhan thong » nhan trong, nha thong, nhan khong
thong cong » trong cong, tong cong, thong thong
hieu lang » hieu quang, nhieu tang, hieu van
cong dan » cong san, cong tan, huong 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: doc ((chieu sang) or (hieu lang)) - chinh doanh nhan thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (hieu lang)) - chinh doanh nhan thong cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (hieu lang)) - chinh doanh nhan thong cong dan van ban*.