Perhaps you should try some spelling variations:
cong chieng » cong chung
khanh phung » khanh phong, thanh phuong, khanh thuong
thong cong » trong cong, tong cong, thong thong
cho chieu » ho chieu, theo chieu, chon chien
van thong » van thuong, van phong, va thong
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cho chieu) or (cong chieng)) sach - khanh phung van thong cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cho chieu) OR (cong chieng)) sach - khanh phung van thong cong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((cho chieu) or (cong chieng)) sach - khanh phung van thong cong dan phan tu*.