Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
tac thuong » tai thuong, tam thuong, tac thong
hoc hieu » hoc thieu, doc hieu, hoc dieu
cong tac » cong ty
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc hien)) quang - thanh cong tac thuong cong ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) quang - thanh cong tac thuong cong ban than cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) quang - thanh cong tac thuong cong ban than cau*.