Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, tran tuan
trung tan » trung tran, trung tang, truong tan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
toan cao » toan tap
toan ban » van ban

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

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