Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
nhung huong » nhung tuong, nhung cong, nhung dung
chieu sach » chiet tach, chieu sang, chieu xanh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh va » trinh van, trinh vat, trinh ve
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: ho ((chieu sach) or (chinh sach)) - canh trinh va ((nhung huong) OR (nhung phuong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - canh trinh va ((nhung huong) OR (nhung phuong)) dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - canh trinh va ((nhung huong) OR (nhung phuong)) dan phan tu".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - canh trinh va ((nhung huong) OR (nhung phuong)) dan phan tu*.