Perhaps you should try some spelling variations:
"nguyen chi minh chau" » "nguyen nhu minh chau", "nguyen hai minh chau", "nguyen thu minh chau", "nguyen chi tinh chat"
"nguyen can minh chau" » "nguyen van minh chau", "nguyen xuan minh chau", "nguyen cong minh chau", "nguyen can tinh chat", "nguyen cao minh chau", "nguyen ban minh chau"
"nguyen thi minh khai" » "nguyen thi minh khue", "nguyen thi minh chi", "nguyen thi minh pham", "nguyen thi hanh khai", "nguyen thi bich 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 chi minh chau") OR ("nguyen can minh chau"))) or ("nguyen thi minh khai"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen chi minh chau") OR ("nguyen can minh chau"))) OR ("nguyen thi minh khai")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nguyen chi minh chau\") OR (\"nguyen can minh chau\"))) or (\"nguyen thi minh khai\"))".
• Removing quotes may allow a broader search: (((( nguyen chi minh chau ) OR ( nguyen can minh chau ))) or ( nguyen thi minh khai )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen chi minh chau") OR ("nguyen can minh chau"))) or ("nguyen thi minh khai"))*.