Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cua thuong » cua truong, cua phuong, ca thuong
lieu tinh » trieu tinh, bien tinh
cua khong » hua khong, cua phuong, cua cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: hoc ((diep tinh) OR (lieu tinh)) - hanh tranh ((cua khong) OR (cua thuong)) cong san toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((diep tinh) or (lieu tinh)) - hanh tranh ((cua khong) OR (cua thuong)) cong san toan tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((diep tinh) or (lieu tinh)) - hanh tranh ((cua khong) OR (cua thuong)) cong san toan tap*.