Perhaps you should try some spelling variations:
thanh phuong » thanh huong, thanh chuong, khanh phong
phuong cham » phuong phap, phuong thao
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, mot chieu
dung dong » dung cong, vung dong, dung trong
dung dat » dung va, dung tai
ban dan » ban hang, ban hanh, ban quan

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 sang - thanh phuong cham ((dung dat) or (dung dong)) van ban dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh phuong cham ((dung dat) OR (dung dong)) van ban dan*.