Perhaps you should try some spelling variations:
"nhan vat va chinh tri vien." » "nhan vat tai chinh tri vien." (Expand Search), "nhan vat cua chinh tri vien." (Expand Search), "nhan vat va chinh tai vien." (Expand Search), "nhan vat va chinh tri viet." (Expand Search), "nhan vat va chinh tri chien." (Expand Search), "nhan vat van chinh tri vien." (Expand Search), "nhan dat va chinh tri vien." (Expand Search), "nhan vat ve chinh tri vien." (Expand Search), "phan vat va chinh tri vien." (Expand Search)
"nhan vat va chinh tri kien." » "nhan vat tai chinh tri kien." (Expand Search), "nhan vat cua chinh tri kien." (Expand Search), "nhan vat va chinh trien kien." (Expand Search), "nhan vat va chinh tri kinh." (Expand Search), "nhan vat van chinh tri kien." (Expand Search), "nhan dat va chinh tri kien." (Expand Search), "nhan vat ve chinh tri kien." (Expand Search), "phan vat va chinh tri kien." (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 va chinh tri vien.") OR ("nhan vat va chinh tri kien."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat va chinh tri vien.\") OR (\"nhan vat va chinh tri kien.\"))".
• Removing quotes may allow a broader search: (( nhan vat va chinh tri vien. ) OR ( nhan vat va chinh tri kien. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat va chinh tri vien.") OR ("nhan vat va chinh tri kien."))*.