Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
anh quang » anh xquang, anh quan, nhanh quang
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, hoc thieu, doi chieu
anh sang » lanh sang, anh bang, anh dang
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - ((anh sang) or (anh quang)) cua thong cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((anh sang) OR (anh quang)) cua thong cong san than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((anh sang) or (anh quang)) cua thong cong san than cau*.