Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
thuong dam » thuong mai, huong dan, truong dai
trung cua » truong cua, trung tuan, trung cap
cua hang » cua dang, cua nhung, cua cong
than cau » toan cau, phan cau, than cap
toan ban » van ban

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)) - thanh trung cua hang thuong dam ((than cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thien hach)) - thanh trung cua hang thuong dam ((than cau) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thien hach)) - thanh trung cua hang thuong dam ((than cau) or (toan ban))*".