Perhaps you should try some spelling variations:
doi chinh » do chinh, tai chinh, hoc chinh
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac
san chan » san chang, dan chan, san chay
chan ban » can ban, chat ban, chan nan

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 van)) hang cong san chan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - hanh ((trinh va) OR (trinh van)) hang cong san chan ban".
• Adding a wildcard symbol may retrieve word variants: doi chinh sach - hanh ((trinh va) OR (trinh van)) hang cong san chan ban*.