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