Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
truong cua » truong ca, truong quan, truong cao
cong thanh » dong thanh, cong trinh, truong thanh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong tan » cong tac, cong san, cong ty
tra tap » toan tap, tran tan

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

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