Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
bang cong » dang cong, bang song, hang cong
cua bang » chua bang, cua ban, cua dang
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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 tung) or (thanh thuong)) cua bang cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((thanh tung) OR (thanh thuong)) cua bang cong tac ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((thanh tung) or (thanh thuong)) cua bang cong tac ((toan cau) or (toan cao))*.