Perhaps you should try some spelling variations:
chieu quang » hieu quang, thieu quang, chu quang
thanh thang » nhanh thang, thanh thanh, thanh hang
thong binh » thuong binh, thong minh, trong binh
binh luan » trinh luan
ho chieu » theo chieu, hoc thieu, mot chieu
va thong » va phuong, he thong, va cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu quang - thanh thang ((va thong) or (va thuong)) thong binh luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu quang - thanh thang ((va thong) OR (va thuong)) thong binh luan van.
• Adding a wildcard symbol may retrieve word variants: ho chieu quang - thanh thang ((va thong) or (va thuong)) thong binh luan van*.