Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
cua thuong » cua truong, cua phuong, ca thuong
hieu lang » hieu quang, nhieu tang, hieu van
cua thong » cua khong, cua tong, suat thong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
than cap » khan cap, thanh lap, thanh cac

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

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