Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
tuong cua » truong cua, huong cua, thong cua
tong cong » trong cong, cong cong, dung cong
bang cong » dang cong, bang song, hang cong
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 tuong cua ((tong cong) or (bang cong)) dan ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tuong cua ((tong cong) OR (bang cong)) dan ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tuong cua ((tong cong) or (bang cong)) dan ((toan cao) or (van ban))*.