Perhaps you should try some spelling variations:
thanh quang » nhanh quang, thanh quan, than quang
chieu sang » chieu sach, chieu xanh, hieu lang
quang tuan » quang thanh, quan luan, quang cua
tuan nhung » quan nhung, tuan hung, thuat nhung
doi chieu » doc hieu, doi chi, ho chieu
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 quang tuan nhung ((nang suat) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh quang tuan nhung ((nang suat) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh quang tuan nhung ((nang suat) or (cong san)) phan cau*.