Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
cua thuong » cua truong, cua phuong, ca thuong
cuong dung » tuong duong, ung dung, thong dung
dung thanh » duong thanh, dong thanh, dang thanh
hieu lang » chieu sang, nhieu tang, hieu van
cua thong » cua khong, cua tong, suat thong
thanh ca » thanh cha, thanh cac, thanh 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 ((hieu lang) OR (hieu quang)) - thanh trung ((cua thong) or (cua thuong)) cuong dung thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu quang)) - thanh trung ((cua thong) OR (cua thuong)) cuong dung thanh ca.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - thanh trung ((cua thong) or (cua thuong)) cuong dung thanh ca".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - thanh trung ((cua thong) or (cua thuong)) cuong dung thanh ca*.