Perhaps you should try some spelling variations:
"nhan vat cua chinh tri kien." » "nhan vat cua chinh trien kien." (Expand Search), "nhan vat cua chinh tri kinh." (Expand Search), "nhan vat chat chinh tri kien." (Expand Search)
"nhan mat luan chinh tri vien." » "nhan dat luan chinh tri vien." (Expand Search), "nhan hat luan chinh tri vien." (Expand Search), "nhan bat luan chinh tri vien." (Expand Search), "nhan chat luan chinh tri vien." (Expand Search), "nhan luat luan chinh tri vien." (Expand Search), "nhan mat cua chinh tri vien." (Expand Search), "nhan mat luan chinh tai vien." (Expand Search), "nhan mat luan chinh tri viet." (Expand Search), "nhan mat luan chinh tri chien." (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("nhan vat cua chinh tri kien.") OR ("nhan mat luan chinh tri vien."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat cua chinh tri kien.\") OR (\"nhan mat luan chinh tri vien.\"))".
• Removing quotes may allow a broader search: (( nhan vat cua chinh tri kien. ) OR ( nhan mat luan chinh tri vien. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat cua chinh tri kien.") OR ("nhan mat luan chinh tri vien."))*.