Perhaps you should try some spelling variations:
chinh cua » chinh ca, chinh sua, hinh cua
cua sinh » hoa sinh
cua dang » cua cong, cua ban
nong dan » nong san, nguong dan, huong dan
cong dan » cong san, cong tan, huong dan
toan cao » toan ban, toan tap
va sinh » va kinh, va tinh, vi sinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((cua sinh) OR (va sinh)) - hanh chinh cua dang ((nong dan) or (cong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((cua sinh) OR (va sinh)) - hanh chinh cua dang ((nong dan) OR (cong dan)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((cua sinh) OR (va sinh)) - hanh chinh cua dang ((nong dan) or (cong dan)) toan cao*".