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, anh tuan
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kien sach - hanh chinh sua nhung cong ((((van tuan) OR (van ban))) or (ban hang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien sach - hanh chinh sua nhung cong ((((van tuan) OR (van ban))) OR (ban 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 (van ban))) or (ban hang)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - hanh chinh sua nhung cong ((((van tuan) OR (van ban))) or (ban hang)) cau*.