Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chinh » do chinh, tai chinh, hoc chinh
trinh vat » trinh van, trinh luat, sinh vat
trinh va » trinh van, trinh ve, trinh vi
cong san » cong tac
chan ban » chat ban, chan nan, chan doan
can ban » van ban, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chinh sach - hanh ((trinh va) OR (trinh vat)) nhung cong san ((chan ban) or (can ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - hanh ((trinh va) OR (trinh vat)) nhung cong san ((chan ban) OR (can ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - hanh ((trinh va) OR (trinh vat)) nhung cong san ((chan ban) or (can ban))".
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - hanh ((trinh va) OR (trinh vat)) nhung cong san ((chan ban) or (can ban))*.