Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
theo chieu » theo tieu, ho chieu, theo chu
doc hieu » toc thieu, hoc thieu, hoc hien
va tuong » va thuong, va thong, xa truong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
va tong » va thong, va trong, va cong

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chieu)) xanh - thanh thuong ((va tong) OR (va tuong)) cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo chieu)) xanh - thanh thuong ((va tong) OR (va tuong)) cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chieu)) xanh - thanh thuong ((va tong) OR (va tuong)) cong tac toan cau*.