Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trinh » hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, cua tong
hoc hieu » hoc thieu, hoc hien, doc hieu
tan doan » tran doan, tap doan, toan doanh
van doan » van doanh, van toan, van hoan

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

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