Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
trinh tu » trinh ky, trinh do
cong tac » cong ty
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
toan ban » van ban
tu dung » tuc dung, tu duong, su dung

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: hoc chieu xanh - canh trinh tu dung cong tac ((toan tai) OR (((toan cao) OR (toan ban))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - canh trinh tu dung cong tac ((toan tai) or (((toan cao) OR (toan ban))))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - canh trinh tu dung cong tac ((toan tai) or (((toan cao) OR (toan ban))))*.