Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh toan » tinh toan, thanh toan, trinh han
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
cong tan » cong tac, cong san, cong ty
phan dau » phan tu, hang dau

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: doi chieu xanh - canh ((trinh toan) OR (trinh luat)) nhung ((cong tan) OR (cong thanh)) phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh ((trinh toan) or (trinh luat)) nhung ((cong tan) OR (cong thanh)) phan dau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - canh ((trinh toan) or (trinh luat)) nhung ((cong tan) OR (cong thanh)) phan dau*.