Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
nhanh lang » nhanh quang, nhanh thang, nhan dang
suat trong » suat thong, luat trong, thuat trong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh mang » nhanh mang, thanh hang, hoach mang
doc hieu » toc thieu, hoc thieu, 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: doc hieu xanh - ((((hanh mang) OR (hanh trang))) or (nhanh lang)) suat trong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((((hanh mang) OR (hanh trang))) OR (nhanh lang)) suat trong cong dan van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((((hanh mang) OR (hanh trang))) or (nhanh lang)) suat trong cong dan van ban*".