Perhaps you should try some spelling variations:
chieu quang » hieu quang, thieu quang, chu quang
thanh thong » thanh thuong, thanh hong, thanh thang
thong manh » thong minh, thong mang, thong danh
va phuong » va thuong, cac phuong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, mot chieu
toan ban » van ban

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 thong ((he thong) or (va phuong)) thong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu quang - thanh thong ((he thong) OR (va phuong)) thong manh toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu quang - thanh thong ((he thong) or (va phuong)) thong manh toan ban*.