Perhaps you should try some spelling variations:
"nguyen hanh quoc." » "nguyen thanh quoc." (Expand Search), "nguyen khanh quoc." (Expand Search), "nguyen manh quoc." (Expand Search), "nguyen phanh quoc." (Expand Search), "nguyen nhanh quoc." (Expand Search), "nguyen hangh quoc." (Expand Search), "nguyen khach quoc." (Expand Search), "nguyen chinh quoc." (Expand Search), "nguyen doanh quoc." (Expand Search), "nguyen hcanh quoc." (Expand Search), "nguyen hdoanh quoc." (Expand Search), "nguyen htranh quoc." (Expand Search)
"nguyen han quoc." » "nguyen phan quoc." (Expand Search), "nguyen nhan quoc." (Expand Search), "nguyen hang quoc." (Expand Search), "nguyen tran quoc." (Expand Search), "nguyen nhap quoc." (Expand Search), "nguyen hoc quoc." (Expand Search)
"nguyen anh quoc." » "nguyen thanh quoc." (Expand Search), "nguyen dinh quoc." (Expand Search), "nguyen minh quoc." (Expand Search), "nguyen canh quoc." (Expand Search), "nguyen doanh quoc." (Expand Search), "nguyen tranh quoc." (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: (("nguyen han quoc.") OR ((("nguyen hanh quoc.") OR ("nguyen anh quoc."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nguyen han quoc.\") OR (((\"nguyen hanh quoc.\") OR (\"nguyen anh quoc.\"))))".
• Removing quotes may allow a broader search: (( nguyen han quoc. ) OR ((( nguyen hanh quoc. ) OR ( nguyen anh quoc. )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen han quoc.") OR ((("nguyen hanh quoc.") OR ("nguyen anh quoc."))))*.