Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
ho thiet » hoc thiet, hoa thiet, so thiet
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam

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

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