Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh tung » manh hung, thanh tung
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tung cua » trung cua, tuong cua, dung cua
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 (hieu manh)) - manh tung cua ((hang cong) or (dang cong)) tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - manh tung cua ((hang cong) OR (dang cong)) tinh toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - manh tung cua ((hang cong) or (dang cong)) tinh toan tap*.