Perhaps you should try some spelling variations:
"nhan vat cua chinh tri viet." » "nhan vat luan chinh tri viet." (Expand Search), "nhan vat cua chinh tai viet." (Expand Search), "nhan vat cua chinh thi viet." (Expand Search), "nhan vat cua chinh dai viet." (Expand Search), "nhan vat chat chinh tri viet." (Expand Search), "phan vat cua chinh tri viet." (Expand Search)
"nhan vat nu chinh dau viet." » "nhan vat nu hinh dau viet." (Expand Search), "nhan vat nu chinh phu viet." (Expand Search), "nhan vat nu tinh dau viet." (Expand Search), "nhan vat su chinh dau viet." (Expand Search), "nhan vat tu chinh dau viet." (Expand Search), "nhan vat cuu chinh dau viet." (Expand Search), "nhan vat nu chinh dau vet." (Expand Search), "nhan vat nu chinh mau viet." (Expand Search), "nhan vat nu chinh cau viet." (Expand Search), "nhan vat xu chinh dau viet." (Expand Search), "phan vat nu chinh dau 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 tri viet.") OR ("nhan vat nu chinh dau viet."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat cua chinh tri viet.\") OR (\"nhan vat nu chinh dau viet.\"))".
• Removing quotes may allow a broader search: (( nhan vat cua chinh tri viet. ) OR ( nhan vat nu chinh dau viet. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat cua chinh tri viet.") OR ("nhan vat nu chinh dau viet."))*.