Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
trung tran » trung tuan, trung thanh, trung tam
tran thong » toan thong, tran hong, tran trong
dung thanh » duong thanh, dang thanh, dung thang
dong thanh » truong thanh
hieu lang » hieu quang, nhieu tang, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) OR (chieu sang)) - thanh trung tran thong thong ((dung thanh) or (dong thanh)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - thanh trung tran thong thong ((dung thanh) OR (dong thanh)) cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - thanh trung tran thong thong ((dung thanh) or (dong thanh)) cac".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - thanh trung tran thong thong ((dung thanh) or (dong thanh)) cac*.