Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chinh » do chinh, tai chinh, hoc chinh
lang cong » bang cong, hang cong, lang dong
dang cong » dung cong
trinh va » trinh van, trinh vat, trinh ve
chan ban » can ban, chat ban, chan doan
chan nan » chan nhan, chang nang, chan doan

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 ((lang cong) OR (dang cong)) san ((chan ban) or (chan nan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chinh sach - hanh trinh va ((lang cong) OR (dang cong)) san ((chan ban) OR (chan nan))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chinh sach - hanh trinh va ((lang cong) OR (dang cong)) san ((chan ban) or (chan nan))*".