Perhaps you should try some spelling variations:
triet tinh » trieu tinh, trien tinh, trien kinh
canh doanh » hanh doanh, chinh doanh, doanh doanh
mon triet » minh triet, bo triet, mao triet
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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: mon triet tinh - ((canh doanh) OR (kinh doanh)) luan han cong ((dan toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mon triet tinh - ((canh doanh) or (kinh doanh)) luan han cong ((dan toan) OR (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: mon triet tinh - ((canh doanh) or (kinh doanh)) luan han cong ((dan toan) OR (dan than)) cau*.