Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
trung tuan » trung tam, tran tuan, truong thanh
cong trong » cong thuong, duong trong, cong trinh
hieu lang » hieu quang, nhieu tang, hieu van
trong dan » trong dang, trong san, trong tan
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai

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

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