Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
dong thuong » cong thuong, dong thong, dung thuong
thuong kenh » thong kenh, thuong kinh, thuong binh
doi chieu » doc hieu, doi chi, mot chieu
kenh phan » benh nhan, benh phau, ke phan
thong tu » phong tuc, thong tin, thong ke

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) lang - thanh thong tu dong thuong kenh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) lang - thanh thong tu dong thuong kenh phan tu*.