Perhaps you should try some spelling variations:
dong doanh » dung doanh, trong doanh, doanh doanh
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trinh cua » trinh quan, trinh luan, trinh chat
dung dong » dung cong, vung dong, dung trong
doanh van » doan van, doanh va, doanh ban
tinh cua » sinh cua, tinh chat, tranh cua

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

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