Perhaps you should try some spelling variations:
luat thuong » suat thong
thuong cong » thong cong, thuong con, thuong dong
hanh trinh » hanh chinh
hoc chieu » hoc thieu, hoc hien, hoc dieu
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: ((hoc chieu) OR (ho chieu)) xanh - ((hanh trinh) or (canh tranh)) luat thuong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (ho chieu)) xanh - ((hanh trinh) OR (canh tranh)) luat thuong cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (ho chieu)) xanh - ((hanh trinh) or (canh tranh)) luat thuong cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (ho chieu)) xanh - ((hanh trinh) or (canh tranh)) luat thuong cong tac toan cau*.