Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
dung huong » dung thuong, dung phuong, dong huong
tranh van » tran van, trinh van, thanh van
van dung » van dong, xay dung, tin dung
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: toc ((thieu xanh) or (chieu xanh)) - canh tranh van dung huong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (chieu xanh)) - canh tranh van dung huong dan van ban*.