Perhaps you should try some spelling variations:
"nguyen thi tminh khai" » "nguyen thi minh khai", "nguyen thi trinh khai", "nguyen thi tinh thai", "nguyen thi thinh khai"
"nguyen thi nhanh thai" » "nguyen thi nhanh thi", "nguyen thi nhanh thanh", "nguyen thi nhanh thang", "nguyen chi nhanh thai", "nguyen thi thanh thai", "nguyen thi khanh thai"
"nguyen thi hanh khai" » "nguyen thi manh khai", "nguyen thi thanh hai", "nguyen thi minh khai", "nguyen thi thanh 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 tminh 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 tminh khai")).
• Removing quotes may allow a broader search: (((( nguyen thi hanh khai ) or ( nguyen thi nhanh thai ))) or ( nguyen thi tminh khai )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen thi hanh khai") or ("nguyen thi nhanh thai"))) or ("nguyen thi tminh khai"))*.