Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
phuong dan » phuong danh, phuong doan, huong dan
hieu lang » chieu sang, nhieu tang, hieu van
trung va » truong va, trang va, trung ha
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (hieu quang)) - thanh trung va nhung phuong dan toan tap~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (hieu quang)) - thanh trung va nhung phuong dan toan tap*.