Perhaps you should try some spelling variations:
dung cong » dung trong
hoa tinh » hoa binh, ha tinh, hoa hinh
hoa sinh » cho sinh
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
luat » luan, xuat

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

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