Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
tieu xanh » tieu danh, dieu hanh, tien manh
dung cong » dung trong
tien anh » tieng anh, tien manh, dien anh
trung va » truong va, trang va, trung ha
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((tieu xanh) OR (tien anh))) or (chieu xanh)) - thanh trung va dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((tieu xanh) OR (tien anh))) OR (chieu xanh)) - thanh trung va dung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((tieu xanh) OR (tien anh))) or (chieu xanh)) - thanh trung va dung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((((tieu xanh) OR (tien anh))) or (chieu xanh)) - thanh trung va dung cong tac toan cau*.