Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
cua thuong » cua truong, cua phuong, ca thuong
cong thang » cong thanh, cang thang, cong thong
thang phan » thanh phan, thong phan, than phan
hanh dung » thanh dung, anh dung, hanh dong
dung cua » dung luan, dung cho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) or (thieu quang)) - hanh dung cua thuong cong thang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (thieu quang)) - hanh dung cua thuong cong thang phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (thieu quang)) - hanh dung cua thuong cong thang phan tu*.