Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hoan chinh » hanh chinh, hoa hinh
hanh trinh » hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
hoc chinh » hoc sinh, hoc kinh
cong san » cong tac
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: ((hoc chinh) or (hoan chinh)) sach - ((hanh trinh) OR (canh tranh)) cua thuong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoan chinh)) sach - ((hanh trinh) OR (canh tranh)) cua thuong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chinh) or (hoan chinh)) sach - ((hanh trinh) OR (canh tranh)) cua thuong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoan chinh)) sach - ((hanh trinh) OR (canh tranh)) cua thuong cong san toan ban*.