Perhaps you should try some spelling variations:
duong minh » duong manh, truong minh, thong minh
tranh van » tran van, trinh van, thanh van
dung minh » dung ninh, dung vinh, dung sinh
toan cao » toan ban
toan tap » toan ban
ke tinh » ket tinh, ve tinh, he tinh
van ung » van dung, van hung, van sung
thiet » thieu

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: thiet ke tinh - canh tranh van ung ((dung minh) OR (duong minh)) ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thiet ke tinh - canh tranh van ung ((dung minh) OR (duong minh)) ((toan cao) or (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: thiet ke tinh - canh tranh van ung ((dung minh) OR (duong minh)) ((toan cao) or (toan tap))*.