Perhaps you should try some spelling variations:
chong cong » cong cong, thong cong, cuong cong
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
khong con » khong co, khong ton, thong cong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

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