Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
truong ca » truong va, trong ca, truong dai
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: ho ((hieu manh) or (chieu sang)) - thanh ((truong ca) OR (truong cao)) nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - thanh ((truong ca) OR (truong cao)) nhung cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sang)) - thanh ((truong ca) OR (truong cao)) nhung cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - thanh ((truong ca) OR (truong cao)) nhung cong dan van ban*.