Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh chua » trinh chuan, trinh cua, tinh chua
trinh chu » trinh cau, trinh cho, trinh thuc
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than ban » thanh ban, toan ban, than man

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 tinh - hanh ((trinh chua) OR (trinh chu)) dung ((cong dan) OR (cong san)) than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - hanh ((trinh chua) OR (trinh chu)) dung ((cong dan) or (cong san)) than ban~".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh ((trinh chua) OR (trinh chu)) dung ((cong dan) or (cong san)) than ban*.