Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong chan, trong chuong
trong thuan » trong thuat, trong tuan, trong thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: hoc chieu xanh - thanh ((trong chuan) OR (trong thuan)) dung ((cong dan) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh ((trong chuan) OR (trong thuan)) dung ((cong dan) OR (cong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - thanh ((trong chuan) OR (trong thuan)) dung ((cong dan) or (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh ((trong chuan) OR (trong thuan)) dung ((cong dan) or (cong tan)) toan ban*.