Perhaps you should try some spelling variations:
ngang khang » quang khang, nang hang, nganh khong
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung va » truong va, trang va, trung ha

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 va nhung cong ((ngang khang) or (ngan hang)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung va nhung cong ((ngang khang) OR (ngan hang)) cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - thanh trung va nhung cong ((ngang khang) or (ngan hang)) cu".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - thanh trung va nhung cong ((ngang khang) or (ngan hang)) cu*.