Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
luat huong » luat thuong, suat huong, xuat thuong
huong cong » luong cong, duong cong, cuong cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ha tinh » va tinh

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((ha tinh) OR (may tinh)) - canh trinh luat huong cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((ha tinh) OR (may tinh)) - canh trinh luat huong cong dan toan cao*.