Perhaps you should try some spelling variations:
thong tuong » thong thuong, thong thong, thong duong
hieu quang » thieu quang, hieu quan, diep quang
nhanh mang » nhanh lang, hanh mang, nhanh quang
tuong dan » huong dan, tung dan, xuong dan
mang he » bang he, mang ke, mang se
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 he thong tuong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu qua)) - nhanh mang he thong tuong dan van ban*.