Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh dong » thanh duong, thanh cong, nhanh dong
hoc thieu » toc thieu, hoc hien
hanh dong » anh dong, ha dong
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 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 - ((thanh dong) or (hanh dong)) cua ((hang cong) OR (bang cong)) tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((thanh dong) OR (hanh dong)) cua ((hang cong) OR (bang cong)) tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((thanh dong) or (hanh dong)) cua ((hang cong) OR (bang cong)) tac toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((thanh dong) or (hanh dong)) cua ((hang cong) OR (bang cong)) tac toan tap*.