Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
trinh cua » tinh cua, trinh luat, trinh quan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tach) OR (thien hach)) - hanh trinh cua thuong cong dan than man~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thien hach)) - hanh trinh cua thuong cong dan than man".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thien hach)) - hanh trinh cua thuong cong dan than man*.