Perhaps you should try some spelling variations:
"nhan vat cua chinh tai vien." » "nhan vat cua chinh tri vien." (Expand Search), "nhan vat cua chinh ta vien." (Expand Search), "nhan vat cua chi tai vien." (Expand Search), "nhan vat cua chinh tai viet." (Expand Search), "nhan vat cua chinh tai lieu." (Expand Search), "nhan vat chat chinh tai vien." (Expand Search), "phan vat cua chinh tai vien." (Expand Search)
"nhan vat luan chinh dai viet." » "nhan vat luan chinh doi viet." (Expand Search), "nhan vat luan chinh dau viet." (Expand Search), "nhan vat luan chinh hai viet." (Expand Search), "nhan vat quan chinh dai viet." (Expand Search), "nhan mat luan chinh dai viet." (Expand Search), "nhan cat luan chinh dai viet." (Expand Search), "nhan vat luan chinh tai viet." (Expand Search), "phan vat luan chinh dai viet." (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 tai vien.") OR ("nhan vat luan chinh dai viet."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat cua chinh tai vien.\") OR (\"nhan vat luan chinh dai viet.\"))".
• Removing quotes may allow a broader search: (( nhan vat cua chinh tai vien. ) OR ( nhan vat luan chinh dai viet. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat cua chinh tai vien.") OR ("nhan vat luan chinh dai viet."))*.