Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
danh trung » dang trung, dinh trung, manh trung
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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) or (chieu sang)) - ((danh trung) or (thanh trung)) cua thong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - ((danh trung) OR (thanh trung)) cua thong cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - ((danh trung) or (thanh trung)) cua thong cong dan toan ban*.