Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
chieu xanh » chieu sach, chieu sang, chieu tinh
cong quang » thong quang, duong quang, dang quang
doi chieu » doc hieu, doi chi, ho chieu
hanh dung » thanh dung, hanh dong, manh dung
cua thong » cua thuong, cua khong, cua tong
anh dung » anh dong, anh huong, sach dung
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: doi chieu xanh - ((hanh dung) OR (anh dung)) cua thong ((cong quang) or (luong quang)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - ((hanh dung) OR (anh dung)) cua thong ((cong quang) OR (luong quang)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - ((hanh dung) OR (anh dung)) cua thong ((cong quang) or (luong quang)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - ((hanh dung) OR (anh dung)) cua thong ((cong quang) or (luong quang)) toan ban*.