Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
theo chieu » theo tieu, ho chieu, thi chieu
phong cong » phong chong, thong cong, phong dong
chong cong » cong cong, thong cong, cuong cong
theo chu » cho chu, chao chu, theo yeu
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (theo chu)) tinh - canh tranh luan ((phong cong) OR (chong cong)) san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) tinh - canh tranh luan ((phong cong) OR (chong cong)) san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) tinh - canh tranh luan ((phong cong) OR (chong cong)) san toan ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) tinh - canh tranh luan ((phong cong) OR (chong cong)) san toan ban*.