Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hanh trinh » hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
hoc manh » hoc anh, hoc hanh, hoc danh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
cho hoc » co hoc, khoa hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho hoc manh - ((canh tranh) or (hanh trinh)) cua thuong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho hoc manh - ((canh tranh) OR (hanh trinh)) cua thuong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: cho hoc manh - ((canh tranh) or (hanh trinh)) cua thuong cong dan toan cao*.