Perhaps you should try some spelling variations:
thanh tieng » thanh tien, thanh tung, thanh vien
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tieng » anh tieng, ban tieng, hanh trang
trung cong » truong cong, trong cong, trung uong
hoc chieu » hoc thieu, ho chieu, hoc hien
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 chieu xanh - ((thanh tieng) or (hanh tieng)) viet trung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - ((thanh tieng) OR (hanh tieng)) viet trung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((thanh tieng) or (hanh tieng)) viet trung cong dan van ban*.