Perhaps you should try some spelling variations:
"nhan vat cuu chinh tri vien." » "nhan vat cua chinh tri vien." (Expand Search), "nhan vat cuu sinh tri vien." (Expand Search), "nhan vat cuu kinh tri vien." (Expand Search), "nhan vat cuu chinh tri viet." (Expand Search), "nhan vat cuu chinh tri kien." (Expand Search), "nhan vat cuu chinh tri chien." (Expand Search), "nhan vat chu chinh tri vien." (Expand Search), "nhan vat cau chinh tri vien." (Expand Search)
"nhan dat su chi tai vien." » "nhan dan su chi tai vien." (Expand Search), "han dat su chi tai vien." (Expand Search), "nhan dang su chi tai vien." (Expand Search), "nhan dat su chi tai viet." (Expand Search), "nhan dat su chi tai lieu." (Expand Search), "nhan dat su chi dai viet." (Expand Search), "nhan dat su chia tai vien." (Expand Search), "nhan dat su che tai vien." (Expand Search), "nhan dat su chu tai vien." (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 dat su chi tai vien.") OR ("nhan vat cuu chinh tri vien."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan dat su chi tai vien.\") OR (\"nhan vat cuu chinh tri vien.\"))".
• Removing quotes may allow a broader search: (( nhan dat su chi tai vien. ) OR ( nhan vat cuu chinh tri vien. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan dat su chi tai vien.") OR ("nhan vat cuu chinh tri vien."))*.