Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
chieu sach » chinh sach, chiet tach, chieu sang
cong quang » luong quang, thong quang, duong quang
cong ngang » cong nhan, cong lang, cong nong
quan dung » quang dung, quan duong, qua dung
ho chieu » theo chieu, hoc thieu, doi chieu
than cap » khan cap, thanh lap, thanh cac

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 sach - thanh thong quan dung ((cong quang) or (cong ngang)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh thong quan dung ((cong quang) OR (cong ngang)) than cap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh thong quan dung ((cong quang) or (cong ngang)) than cap*.