Perhaps you should try some spelling variations:
khoang cong » hoang cong, khoang trong, thong cong
chieu xanh » chieu sach, chieu sang, chieu tinh
tao khoang » tao zhang
hieu manh » hieu nganh, dieu hanh, hien hanh
huong tao » huong tac, huong tam, phuong thao
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: hoc ((hieu manh) or (chieu xanh)) - anh huong tao khoang cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - anh huong tao khoang cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - anh huong tao khoang cong dan van ban*.