Perhaps you should try some spelling variations:
doi chiet » doi chieu, doi chi, doi chinh
hang cong » dang cong, hang nong, bang cong
doi viet » dai viet, hoi viet, oi viet
chinh va » chinh ta, chinh tai, hanh va
cong van » cong vang, cong san, song van
va hang » van hang, va nang, va lang
ban cao » bao cao, ban can, ban co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chiet) or (doi viet)) tach - hanh chinh va hang cong van ban cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chiet) OR (doi viet)) tach - hanh chinh va hang cong van ban cao*.