Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
quang tuan » quang thanh, quan luan, quang cua
doi chieu » doc hieu, doi chi, ho chieu
tung tuan » trung tuan, hung tuan, trang tuan
dung cong » dung trong
dang toan » dang tran, dan toan, dang thanh
dung toan » dung doanh, dung thang, dung thanh

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 xanh - thanh ((tung tuan) OR (quang tuan)) dung cong ((dang toan) or (dung toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh ((tung tuan) OR (quang tuan)) dung cong ((dang toan) OR (dung toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh ((tung tuan) OR (quang tuan)) dung cong ((dang toan) or (dung toan)) cao".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh ((tung tuan) OR (quang tuan)) dung cong ((dang toan) or (dung toan)) cao*.