Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
hieu manh » chieu xanh, hieu nganh, hien hanh
luan kinh » xuan kinh, luat kinh, luan chinh
kinh cong » minh cong, sinh cong, dinh cong
cong dan » cong san, cong tan, huong dan
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (dieu hanh)) - canh tranh luan kinh cong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - canh tranh luan kinh cong dan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - canh tranh luan kinh cong dan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - canh tranh luan kinh cong dan ((toan cau) or (toan cao))*.