Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trong dung » thong dung, trung dung, trong rung
dung doanh » dung dan, dung dong
doi chieu » doc hieu, doi chi, ho chieu
cong tuan » cong tan, cong thanh, cong quang
cong luan » tong luan, dong luan, cong luong
phan cau » phan dau, phan cac, phan lap

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 ((cong tuan) OR (cong luan)) trong dung doanh ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((cong tuan) OR (cong luan)) trong dung doanh ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh ((cong tuan) OR (cong luan)) trong dung doanh ((phan cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((cong tuan) OR (cong luan)) trong dung doanh ((phan cau) or (phan tu))*.