Perhaps you should try some spelling variations:
"nhan vat tai chinh tri viet." » "nhan vat tai chinh tai viet." (Expand Search), "nhan vat tai chinh thi viet." (Expand Search), "nhan vat tai chinh dai viet." (Expand Search), "nhan sat tai chinh tri viet." (Expand Search)
"phan vat tu chinh tri viet." » "phan vat tu chinh tai viet." (Expand Search), "phan vat tu chinh thi viet." (Expand Search), "phan vat tu chinh dai viet." (Expand Search), "phan van tu chinh tri viet." (Expand Search), "phan va tu chinh tri viet." (Expand Search), "phan vao tu chinh tri viet." (Expand Search), "phan vat te chinh tri viet." (Expand Search), "phan vat su chinh tri viet." (Expand Search), "phan vat cua chinh tri viet." (Expand Search), "phan bat tu chinh tri viet." (Expand Search), "phan vat tieu chinh tri 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 tai chinh tri viet.") OR ("phan vat tu chinh tri viet."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat tai chinh tri viet.\") OR (\"phan vat tu chinh tri viet.\"))".
• Removing quotes may allow a broader search: (( nhan vat tai chinh tri viet. ) OR ( phan vat tu chinh tri viet. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat tai chinh tri viet.") OR ("phan vat tu chinh tri viet."))*.