Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
thong hang » thong hoang, thong mang, thong nang
phan hieu » van hieu, phan kien, gian hieu
hanh mang » nhanh mang, hanh trang, nhanh lang
nhan dang » nhan dan, phan dang, tran dang
va thong » va thuong, va phuong, he thong
va ban » van ban, va bai, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: phan hieu quang - ((hanh mang) or (nhan dang)) va thong thong hang va ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: phan hieu quang - ((hanh mang) OR (nhan dang)) va thong thong hang va ban*.