Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
kien sach » dien sach, vien bach, kien mac
chinh sua » chinh su, chinh cua, chinh luan
sua nhung » cua nhung, qua nhung, chua nhung
hoc kien » hoc hien, hoc vien, hoa kien
van tuan » van quan, van ban, anh tuan

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: hoc kien sach - hanh chinh sua nhung cong ((van tuan) OR (((ban hang) OR (ngan hang)))) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kien sach - hanh chinh sua nhung cong ((van tuan) or (((ban hang) OR (ngan hang)))) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - hanh chinh sua nhung cong ((van tuan) or (((ban hang) OR (ngan hang)))) cau*.