Perhaps you should try some spelling variations:
"nguyen thi nhanh thai" » "nguyen thi nhanh thi", "nguyen thi nhanh thanh", "nguyen thi nhanh thang", "nguyen chi nhanh thai", "nguyen thi khanh thai", "nguyen ghi nhanh thai"
"nguyen thi thanh khai" » "nguyen thi thanh hai", "nguyen thi than khai", "nguyen thi thanh phan", "nguyen thi tmanh khai", "nguyen thi tthanh hai", "nguyen thi tminh khai"
"nguyen thi hanh khai" » "nguyen thi manh khai", "nguyen thi thanh hai", "nguyen thi minh khai"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nguyen thi hanh khai") OR ("nguyen thi nhanh thai"))) or ("nguyen thi thanh khai"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen thi hanh khai") OR ("nguyen thi nhanh thai"))) OR ("nguyen thi thanh khai")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nguyen thi hanh khai\") OR (\"nguyen thi nhanh thai\"))) or (\"nguyen thi thanh khai\"))".
• Removing quotes may allow a broader search: (((( nguyen thi hanh khai ) OR ( nguyen thi nhanh thai ))) or ( nguyen thi thanh khai )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen thi hanh khai") OR ("nguyen thi nhanh thai"))) or ("nguyen thi thanh khai"))*.