Perhaps you should try some spelling variations:
thuong duong » tuong duong, thuong luong, chuong duong
hieu quang » thieu quang, hieu quan, diep quang
nhanh mang » nhanh lang, hanh mang, nhanh quang
duong dan » duong dang, huong dan, duong van
mang va » mang vua, hang va, bang va
dan van » dang van, doan van, dao van

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 quang) or (hieu qua)) - nhanh mang va thuong duong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - nhanh mang va thuong duong dan van ban*.