Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong tieng » trong tieng, thong tin, thong thong
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
cua thong » cua thuong, cua khong, cua tong
viet toan » viet hoan, viet tran, viet tuan
toan tap » toan 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 ((thieu xanh) OR (chieu xanh)) - ((hanh chinh) or (thanh trung)) cua thong tieng viet toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - ((hanh chinh) OR (thanh trung)) cua thong tieng viet toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - ((hanh chinh) or (thanh trung)) cua thong tieng viet toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - ((hanh chinh) or (thanh trung)) cua thong tieng viet toan tap*.