Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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 xanh) OR (chieu sang))) or (hieu lang)) - hanh tranh cua dung cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((((chieu xanh) OR (chieu sang))) OR (hieu lang)) - hanh tranh cua dung cong dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((((chieu xanh) OR (chieu sang))) or (hieu lang)) - hanh tranh cua dung cong dan toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((((chieu xanh) OR (chieu sang))) or (hieu lang)) - hanh tranh cua dung cong dan toan ban*.