Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chinh » do chinh, tai chinh, doi chi
hoc chinh » hoan chinh, hoc sinh, hoc kinh
lang cong » dang cong, bang cong, hang cong
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
san chan » san chang, dan chan, san chay
chan ban » can ban, chat ban, chan nan
va lang » va nang, hoa lang

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