Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
hanh trinh » canh tranh, hanh chinh
thuong con » thuong dong, truong cong, thong cong
doc hieu » toc thieu, hoc thieu, hoc hien
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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) or (theo tieu)) sang - hanh trinh luat ((thuong cong) OR (thuong con)) van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) sang - hanh trinh luat ((thuong cong) OR (thuong con)) van toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo tieu)) sang - hanh trinh luat ((thuong cong) OR (thuong con)) van toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) sang - hanh trinh luat ((thuong cong) OR (thuong con)) van toan cau*.