Perhaps you should try some spelling variations:
"nguyen hai minh chau" » "nguyen thi minh chau", "nguyen van minh chau", "nguyen can minh chau", "nguyen hai tinh chat", "nguyen khai minh chau", "nguyen thai minh chau", "nguyen hai linh chau"
"nguyen huu minh thi" » "nguyen duc minh thi", "nguyen huu dinh thi", "nguyen huu minh thu", "nguyen huu minh tri", "nguyen huu manh thi", "nguyen huu binh thi"
"nguyen tu minh thi" » "nguyen tuan minh thi", "nguyen thi minh thi", "nguyen duc minh thi", "nguyen tu dinh thi", "nguyen tu minh thu", "nguyen tu minh tri", "nguyen thu minh thi", "nguyen vu minh thi"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nguyen tu minh thi") or ("nguyen huu minh thi"))) or ("nguyen hai minh chau"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen tu minh thi") OR ("nguyen huu minh thi"))) OR ("nguyen hai minh chau"))*.
• Removing quotes may allow a broader search: (((( nguyen tu minh thi ) or ( nguyen huu minh thi ))) or ( nguyen hai minh chau ))*.