Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
thong chuan » thong chuon, trong chuan, thong chuyen
chuan bang » chua bang, chuan trang, can bang
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, cong dong
toan ban » van ban

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 - thanh thong chuan bang ((cong dan) OR (huong dan)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh thong chuan bang ((cong dan) OR (huong dan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh thong chuan bang ((cong dan) OR (huong dan)) toan ban*.