Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
cac thuong » cac truong, cac phuong, cac chuong
ho chiet » ho chieu, ho thiet, hoc thiet
cong san » cong tac
toan cao » toan tap
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: ho chiet tach - ((hanh tranh) OR (hanh trinh)) cac thuong cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((hanh tranh) OR (hanh trinh)) cac thuong cong san ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((hanh tranh) OR (hanh trinh)) cac thuong cong san ((toan cao) or (toan ban))*".