Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh dung » thanh duong, thanh tung, thanh hung
hieu manh » chieu xanh, dieu hanh, hieu van
hien hanh » dieu hanh
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doc ((((hieu manh) OR (hien hanh))) OR (hieu nganh)) - thanh dung va thuong cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((((hieu manh) OR (hien hanh))) or (hieu nganh)) - thanh dung va thuong cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: doc ((((hieu manh) OR (hien hanh))) or (hieu nganh)) - thanh dung va thuong cong dan toan cao*.