Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
dang cong » dung cong
cua dang » cua cong, cua ban
doan van » doan va, hoang van, luan van
dan van » dang van, dao van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - canh tranh cua dang cong ((dan van) OR (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - canh tranh cua dang cong ((dan van) OR (doan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - canh tranh cua dang cong ((dan van) OR (doan van)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - canh tranh cua dang cong ((dan van) OR (doan van)) ban*.