Perhaps you should try some spelling variations:
vien nganh » vien thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh lang » nhanh lang, hanh mang, hanh trang
hai dung » hai duong, mai dung, hai dang
cong dan » cong san, cong tan, huong dan
ha dung » kha dung, nha dung, ha dong
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 ((vien nganh) or (chieu xanh)) - hanh lang ((ha dung) OR (hai dung)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((vien nganh) OR (chieu xanh)) - hanh lang ((ha dung) OR (hai dung)) cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((vien nganh) or (chieu xanh)) - hanh lang ((ha dung) OR (hai dung)) cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((vien nganh) or (chieu xanh)) - hanh lang ((ha dung) OR (hai dung)) cong dan van ban*.