Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
trinh cua » trinh luat, trinh quan, trinh luan
hoc chau » hoc chat, moc chau, hoc cau
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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

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