Perhaps you should try some spelling variations:
"nhan vat cua chinh trien ben." » "nhan vat cua chinh truyen ben." (Expand Search), "nhan vat cua chinh bien ben." (Expand Search), "nhan vat cua hinh tien ben." (Expand Search), "nhan vat luan chinh trien ben." (Expand Search), "nhan vat chat chinh trien ben." (Expand Search), "phan vat cua chinh trien ben." (Expand Search), "nhan vat cua chinh trien bien." (Expand Search)
"nhan vat cua chinh tri kien." » "nhan vat luan chinh tri kien." (Expand Search), "nhan vat cua chinh trien kien." (Expand Search), "nhan vat cua chinh tri kinh." (Expand Search), "nhan vat chat chinh tri kien." (Expand Search), "phan vat cua 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 cua chinh tri kien.") OR ("nhan vat cua chinh trien ben."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nhan vat cua chinh tri kien.\") OR (\"nhan vat cua chinh trien ben.\"))".
• Removing quotes may allow a broader search: (( nhan vat cua chinh tri kien. ) OR ( nhan vat cua chinh trien ben. )).
• Adding a wildcard symbol may retrieve word variants: (("nhan vat cua chinh tri kien.") OR ("nhan vat cua chinh trien ben."))*.