Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 - hanh tang luan ((hang cong) OR (bang cong)) tac toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang luan ((hang cong) OR (bang cong)) tac toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang luan ((hang cong) OR (bang cong)) tac toan cao*.