Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
tranh chua » tranh cua, tranh chap, trinh chu
chau tinh » cuu tinh, ha tinh, cua tinh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban
ho chau » ha chau, ho chu, o chau

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

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