Perhaps you should try some spelling variations:
hoan chinh » hanh chinh, hoa hinh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
ho chinh » hoc chinh, cho chinh, hoa chinh
trinh va » trinh van, trinh ve, trinh vi
cong tac » cong ty
tac ran » tac can, tac van, tac quan
ran cau » van cau, ban cau, can cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (hoan chinh)) sach - hanh ((trinh va) OR (trinh vat)) nhung cong tac ran cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) or (hoan chinh)) sach - hanh ((trinh va) OR (trinh vat)) nhung cong tac ran cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) or (hoan chinh)) sach - hanh ((trinh va) OR (trinh vat)) nhung cong tac ran cau*.