Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
cong danh » cuong danh, cong dan, cong thanh
danh phan » doanh phan, danh nhan, danh phap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) OR (hieu lang)) - hanh dung luan chung cong danh phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (hieu lang)) - hanh dung luan chung cong danh phan dau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (hieu lang)) - hanh dung luan chung cong danh phan dau*.