Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » hien hanh, thien thanh, tien thanh
cua thuong » cua truong, cua phuong, ca thuong
trung cua » truong cua, trung tuan, trung cap
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nhanh - thanh trung cua thuong ((cong dan) OR (cong san)) ((khan cap) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - thanh trung cua thuong ((cong dan) OR (cong san)) ((khan cap) OR (khan ap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - thanh trung cua thuong ((cong dan) OR (cong san)) ((khan cap) or (khan ap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - thanh trung cua thuong ((cong dan) OR (cong san)) ((khan cap) or (khan ap))*.