Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
xuat thuong » luat thuong, xuat thong, suat thong
hanh trinh » hanh chinh
hieu tinh » chieu tinh, lieu tinh, kieu tinh
doc hieu » toc thieu, hoc thieu, hoc hien
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: doc hieu tinh - ((hanh trinh) or (canh tranh)) xuat thuong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - ((hanh trinh) OR (canh tranh)) xuat thuong cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - ((hanh trinh) or (canh tranh)) xuat thuong cong san toan ban*.