Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
bien tinh » bi tinh, yen tinh, diep tinh
trung cua » truong cua, trung cap, dung cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan tap » toan ban
ho bien » pho bien, hoa bien, so bien

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

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