Perhaps you should try some spelling variations:
trinh cong » trinh dung
chieu xanh » chieu sach, chieu sang, chieu tinh
dang hanh » dang thanh, ban hanh, dang van
qua trinh » qua kinh
van thanh » ban thanh, van tuan
ho chieu » theo chieu, hoc thieu, doi chieu
hanh qua » thanh qua, hanh sua, hanh cua
dan toan » van toan, dan than, manh toan

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 - dang hanh qua trinh cong ((dan toan) OR (van thanh)) ban~.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - dang hanh qua trinh cong ((dan toan) or (van thanh)) ban*.