Perhaps you should try some spelling variations:
hieu quang » thieu quang, diep quang, huu quang
nhanh mang » nhanh lang, hanh mang, nhanh quang
thong cong » trong cong, tong cong, thong thong
hieu quan » lieu quan, thien quan, lien quan
cong doan » cong dan, cong hoan, dong doanh
va thong » va thuong, va phuong, he thong
doan van » doan va, hoang van, luan van
mang va » mang vua, hang va, bang va

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))) or (hieu quan)) - nhanh mang va thong cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu quang) OR (hieu qua))) OR (hieu quan)) - nhanh mang va thong cong doan van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu quang) OR (hieu qua))) or (hieu quan)) - nhanh mang va thong cong doan van ban*".