Perhaps you should try some spelling variations:
doanh doanh » doanh hoan, doanh thanh, dong doanh
triet tinh » trieu tinh, trien tinh, trien kinh
mon triet » minh triet, bo triet, mao triet
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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