Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh chua » trinh chuan, trinh chu, tinh chua
trinh cua » tinh cua, trinh luat, trinh quan
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan ban » can ban, chat ban, chan nan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu tinh - hanh ((trinh chua) or (trinh cua)) dung ((cong dan) OR (cong san)) chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh ((trinh chua) OR (trinh cua)) dung ((cong dan) OR (cong san)) chan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - hanh ((trinh chua) or (trinh cua)) dung ((cong dan) OR (cong san)) chan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh ((trinh chua) or (trinh cua)) dung ((cong dan) OR (cong san)) chan ban*.