Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chinh cua » chinh ca, hinh cua, chinh luan
chinh sua » chinh su, chinh luan, hinh su
ho thiet » hoc thiet, hoa thiet, hoc thieu
so thiet » soc thiet, hoc thiet, hoa thiet
cong van » cong vang, cong san, song van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) or (so thiet)) tach - hanh ((chinh cua) OR (chinh sua)) nhung cong van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (so thiet)) tach - hanh ((chinh cua) OR (chinh sua)) nhung cong van van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) or (so thiet)) tach - hanh ((chinh cua) OR (chinh sua)) nhung cong van van ban".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) or (so thiet)) tach - hanh ((chinh cua) OR (chinh sua)) nhung cong van van ban*.