Perhaps you should try some spelling variations:
xuat thuong » luat thuong, xuat thong, xuat thuoc
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh ((xuat thuong) OR (suat thong)) cong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trinh ((xuat thuong) or (suat thong)) cong tac toan cau*.